25 نكته گرامري كه هر كسي بايد بداند(بخش دوم)
13.Countable and Uncountable Expressions with Nouns
14.Count and Non-Count Nouns - Understanding Nouns
15.Comparative Forms in English
16.Superlative Forms - Understanding the English Superlative Form
17.Time Expressions and Tenses
18.Adverbs of Frequency - Rules for Use
19.Imperative Form
20.Adverb or Adjective - Which should I use?
21.Present Perfect Tense
22.Past Simple Tense
23.Present Continuous Tense
24.Present Simple vs. Present Continuous
25.Past Simple or Present Perfect
Countable and Uncountable Expressions with Nouns
Countable and Uncountable
Uncountable
Use
the singular form of the verb with uncountable nouns. Use both 'some'
and any' with uncountable nouns when speaking about specific objects.
Examples
Do you have any butter?
There is some juice in the bottle.
If you are speaking in general, do not use a modifier.
Examples
Do you drink coca cola?
He doesn't eat meat.
Countable
Use
the plural form of the verb with countable nouns. Use both 'some' and
'any' with countable nouns when speaking about specific objects.
Examples
There are some magazines on the table.
Has he got any friends?
If you are speaking in general, use the plural form of the noun.
Examples
They love books by Hemingway.
She doesn't eat apples.
Expressions for Use with Countable and Uncountable Nouns
Use the following expressions with uncountable nouns.
most
much, lots of, a lot of
some
a little, little
Examples
There is lots of interest in the project.
She's got some money left in the bank.
There's little time to finish.
Use the following expressions with countable nouns.
many, lots of, a lot of
several
some
not many, only a few, few
Examples
There are a lot of pictures on the wall.
We have several friends in Chicago.
She bought some envelopes this afternoon.
There are only a few people in the restaurant.
Count and Non-Count Nouns - Understanding Nouns
What are countable nouns?
Countable nouns are individual objects, people, places, etc. which can be counted.
books, Italians, pictures, stations, men, etc.
A countable noun can be both singular - a friend, a house, etc. - or plural - a few apples, lots of trees, etc.
Use the singular form of the verb with a singular countable noun:
There is a book on the table.
That student is excellent!
Use the plural form of the verb with a countable noun in the plural:
There are some students in the classroom.
Those houses are very big, aren't they?
What are uncountable nouns?
Uncountable nouns are materials, concepts, information, etc. which are not individual objects and can not be counted.
information, water, understanding, wood, cheese, etc.
Uncountable nouns are always singular. Use the singular form of the verb with uncountable nouns:
There is some water in that pitcher.
That is the equipment we use for the project.
Adjectives with Countable and Uncountable Nouns.
Use a/an with countable nouns preceded by an adjective(s):
Tom is a very intelligent young man.
I have a beautiful grey cat.
Do not use a/an with uncountable nouns preceded by an adjective(s):
That is very useful information.
There is some cold beer in the fridge.
Some
uncountable nouns in English are countable in other languages. This can
be confusing! Here is a list of some of the most common, easy to
confuse uncountable nouns.
accommodation
advice
baggage
bread
equipment
furniture
garbage
information
knowledge
luggage
money
news
pasta
progress
research
travel
work
Comparative Forms in English
We
use the comparative and superlative form to compare and contrast
different objects in English. Use the comparative form to show the
difference between two objects. Example: New York is more exciting than
Seattle. Use the superlative form when speaking about three or more
objects to show which object is 'the most' of something. Example: New
York is the most exciting city in the USA.
Here is a chart
showing how to construct the comparative form in English. Notice in the
example sentences that we use 'than' to compare the two objects:
One Syllable Adjectives
add
'-er' to end of the adjective (Note: double the final consonant if
preceded by a vowel) remove the 'y' from the adjective and add 'ier'
Example: cheap - cheaper / hot - hotter / high - higher
Example Sentences
Yesterday was hotter than today.
This book is cheaper than that book.
Two Syllable Adjectives Ending in '-y'
Example: happy - happier / funny - funnier
Example Sentences
I am happier than you.
That joke was funnier than his joke.
Two, Three or More Syllable Adjectives
place 'more' before the adjective
Example: interesting - more interesting / difficult - more difficult
Example Sentences
London is more expensive than Madrid.
This test is more difficult than the last test.
IMPORTANT EXCEPTIONS
There are some important exceptions to these rules. Here are two of the most important exceptions:
good
• good - adjective
• better - comparative
Example Sentences
This book is better than that one.
I am better at tennis than my sister.
bad
• bad - adjective
• worse - comparative
Example Sentences
His French is worse than mine.
His singing is worse than Tom's.
Superlative Forms - Understanding the English Superlative Form
Here is a chart showing how to construct the superlative form in English:
One Syllable Adjectives
Place
'the' before the adjective and add '-est' to end of the adjective
(Note: double the final consonant if preceded by a vowel).
Example: cheap - the cheapest / hot - the hottest / high - the highest
Example Sentences
Today is the hottest day of the summer.
This book is the cheapest I can find.
Two, Three or More Syllable Adjectives
Place 'the most' before the adjective.
Example: interesting - the most interesting / difficult - the most difficult
Example Sentences:
London is the most expensive city in England.
That is the most beautiful painting here.
Two Syllable Adjectives Ending in '-y' Place 'the' before the adjective and remove the 'y' from the adjective and add 'iest'.
Example: happy - the happiest / funny - the funniest
Example Sentences
New York is the noisiest city in the USA.
He is the most important person I know.
IMPORTANT EXCEPTIONS
There are some important exceptions to these rules. Here are two of the most important exceptions:
good
• good - adjective
• the best - superlative
Example Sentences
Peter is the best golf player in the school.
This is the best school in the city.
bad
• bad - adjective
• the worst - superlative
Example Sentences
Jane is the worst student in the class.
This is the worst day of my life.
Time Expressions and Tenses
Time expressions are used to indicate the time at / during which an action took place. Common time expressions include:
Present
forms: everyday, on Fridays, at the moment, now, as well as adverbs of
frequency such as always, usually, sometimes (for present habits and
routines). Days of the weeks followed by 's' such as Mondays, Tuesdays,
etc.
Examples
He sometimes finishes work early.
Marjorie is listening to the radio at the moment.
Peter goes jogging on Saturdays.
Past forms: when I was ..., last week, day, year, etc., yesterday, ago (two weeks ago, three years ago, four months ago, etc.)
Examples
He visited his friends last week.
I didn't see you two days ago.
Jane flew to Boston yesterday.
Future
forms: next week, year, etc., tomorrow, by (the end of the week,
Thursday, next year, etc.) in X time (in two weeks time, in four months
time, etc.)
Examples
I'm going to attend a conference next week.
It won't snow tomorrow.
They're going to visit New York in two weeks.
Perfect forms: since, yet, already, just, for
Examples
Michael has worked here since 1998.
Have you finished reading the paper yet?
He's just gone to the bank.
Adverbs of Frequency - Rules for Use
Use
adverbs of frequency to say how often you do something. Adverbs of
frequency are often used with the present simple because they indicate
repeated or routine activities. For example, They often go out for
dinner.
Adverbs of frequency include (form most often to least often):
always
usually
often
sometimes
occasionally
seldom
rarely
never
If
the sentence has one verb (e.g. no auxiliary verb) put the adverb in
the middle of the sentence after the subject and before the verb.
Examples
Tom usually goes to work by car.
Janet never flies. She always goes by bus.
Adverbs of frequency come after the verb 'be':
Examples
I am never late for work.
Peter is often at school.
If the sentence has more than one verb (e.g. auxiliary verb), put the adverb of frequency before the main verb.
Examples
I can never remember anything!
They have often visited Rome.
When using adverbs of frequency in the question or negative form, put the adverb of frequency before the main verb.
Examples
She doesn't often visit Europe.
Do you usually get up early?
Imperative Form
Use
the imperative form when giving instructions or orders. The imperative
is also very common in written instructions. Be careful when you use the
imperative, as it is often considered impolite in English. If someone
asks you for instructions, use the imperative. If, on the other hand,
you would like to request that someone do something use a polite
question form.
There is only one imperative form for both 'you' singular and plural.
Examples:
Hurry up!
Take the first left, go straight on and the supermarket is on the left.
Positive
Base Form of Verb + Objects
Turn the music down, please.
Insert coins into the slot.
Negative
Do + Not + Base Form of Verb + Objects
Do not smoke in this building. Don't rush, I'm not in a hurry.
Adverb or Adjective - Which should I use?
Adjectives Modify Nouns
•Adjectives are placed directly before a noun:
Examples:
Tom is an excellent singer.
I bought a comfortable chair.
She's thinking about buying a new house.
•Adjectives
are also used in simple sentences with the verb 'to be'. In this case,
the adjective describes the subject of the sentence:
Examples:
Jack is happy.
Peter was very tired.
Mary'll be excited when you tell her.
Adverbs
Adverbs Modify Verbs, Adjectives and Other Adverbs
•Adverbs are easily recognized because they end in '-ly' (with a few exceptions!):
Examples:
Adjective - careful / Adverb - carefully
Adjective - quick / Adverb - quickly
•Adverbs are often used at the end of a sentence to modify the verb:
Examples:
Jack drove carelessly.
Tom played the match intelligently.
Jason talks about his classes constantly.
Present Perfect Tense
The
present perfect is used to say what has happened recently and has an
effect on the present moment. We often use 'just', 'yet' and 'already'
to express the relationship to the present moment.
Examples
Have you seen Mary yet?
They've already had dinner.
She's just been to the dentist's.
The present perfect is also used to express something which has happened up to the present moment of time.
Examples
Have you worked here for a long time?
Peter's lived here since 1987.
She hasn't had much fun this week.
Positive Form
Subject + have + past participle + object(s)
Examples
Peter's lived here since 1987.
We've been very busy today.
Negative Form
Subject + have + not + past participle + object(s)
Examples
I haven't been to class very often this month.
She hasn't had much fun this week.
Question Form
(Wh?) + have + subject + past participle?
Examples
Have you worked here for a long time?
Where have you been?
Present Perfect for Unspecified Past
When
speaking about an experience that has happened at an UNSPECIFIED point
in time before the present moment use the present perfect.
Examples
I've been to New York three times.
They've lived in many places.
She's studied in London.
NOTE:
In this use of the present perfect, we are talking about things that
have happened up to the present moment. Whenever you speak about
something that has happened up to now without giving a precise point in
time, use the present perfect.
Use of 'For', 'Since' and 'How long'
Use 'for' to indicate a duration or period of time.
Examples
He has lived here for seven years.
We have been here for six weeks.
Shirley has played tennis for a long time.
Use 'since' to indicate a specific point in time.
Examples
I've worked here since 2004.
She's gone to dancing lessons since April.
They've been unhappy since they left college.
Use 'How long' in the question form to ask about duration.
Examples
How long have you played the piano?
How long has he worked here?
How long has she been with you?
Past Simple Tense
Use
the past simple to talk about activities or routines which take place
at a specified time in the past. Notice that all subjects take the same
conjugation of the verb. Regular verbs end in '-ed'.
visit - visited
enjoy - enjoyed
Irregular verbs have various forms and each verb needs to be learned.
see - saw
think - thought
The past simple is used to express a finished past action which occurs at a specific moment in the past.
Examples
She visited Iran last month.
They didn't go to Tom's party last weekend.
Where did you go on vacation last summer?
The following time signifiers often indicate a specific point in time.
last
ago
in ... (plus a year or month)
yesterday
when ... (plus a phrase)
Examples
They had lunch at home last week.
He left the company many years ago.
Susan bought a new car in May.
He telephoned his friend in Rome yesterday.
I played golf when I was a teenager.
Positive Form
Subject + past form of verb + object(s) + time
Examples
They flew to Chicago last month.
Peter completed his course three weeks ago.
Negative Form
Subject + did + not + base form of verb + object(s) + (time)
Examples
They didn't expect to see you at Christmas.
She didn't understand the question.
Question Form
(Wh?) + did + subject + base form of verb + (object(s))+ (time)?
Examples
Where did you study French?
When did you arrive last week?
Present Continuous Tense
Use the present continuous to speak about what is happening at the present moment in time.
Positive Form
Subject + to be + verb + ing + objects
Examples
He is watching TV.
They're playing tennis at the moment.
Negative Form
Subject + are not + verb + ing + objects
Examples
She isn't studying at the moment.
We aren't working now.
Question Form
Wh? + do + subject + verb + ing + objects ?
Examples
What are you doing?
Are you cooking dinner now?
NOTE: We use time expressions like 'at the moment, currently, this week - month' with this form of the present continuous.
Present Simple vs. Present Continuous
Present Simple
Use the present simple to talk about activities or routines which take place on a regular basis.
Examples
I often go jogging on Saturdays.
He usually has coffee for breakfast.
Present Continuous
Use
the present continuous to speak about what is happening at the present
moment in time, around the present moment, or for a future scheduled
event.
Examples
We're working on the Smith account this month.
She's watching TV at the moment.
Stative Verbs
Stative verbs are verbs which express a state. Action verbs are verbs which express something a person does.
Examples
I hope to see you soon. (stative verb) He is cooking dinner at the moment. (action verb)
Stative verbs cannot be used in the continuous forms. Here is a list of common stative verbs:
believe
understand
think (opinion)
want
hope
smell
taste
feel
sound
look
seem
appear
Past Simple or Present Perfect
Sometimes
the past simple and the present perfect are confused. It is important
to remember that the past simple is used to express a finished past
action which occurs at a specific moment in the past. The present
perfect is used to express something that happened at an unspecified
moment in the past. For example, if I visited Paris in 2004, I could
express this in two ways:
Past Simple
I visited Paris in 2004.
I went to Paris a few years ago.
Note that the moment in time is specific - in 2004, a few years ago.
Present Perfect
I've been to Paris.
I've visited Paris.
In
this case, the moment of my visit is not specific. I am speaking about
an experience that I have had in my life up to this moment in time.
This
is the key to understanding the difference between the past simple and
the present perfect. The past simple expresses something which happened
at a specific time in the past. The present perfect expresses something
that I have experienced in my life without giving the exact time.
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