วันอาทิตย์ที่ 19 ธันวาคม พ.ศ. 2553

Imperative sentence

What is imperative sentences?

The imperative mood (abbreviated ) is a grammatical mood that expresses direct commands or requests. It tells you to do something. It is also used to signal a prohibition, permission or any other kind of exhortation.
Definition:
A sentence that gives advice or instructions or that expresses a request or command. (Compare with sentences that make a statement, ask a question, or express an exclamation.) An imperative sentence ends with a period or an exclamation point.

Imperative Sentences
Sentence and Structure

An imperative sentence is used to give a command or to implore or entreat.

People who have authority use imperative sentences. Sometimes, people who don't have authority use imperative sentences. The results may differ.

imperative sentences

Wash the car.
Clean up your room.
Martin, report to the counselor.
Please donate to the community charity fund.


Imperative sentences are used in issuing orders or directives:
Leave your coat in the hall
Give me your phone number
Don't shut the door
Stop!
Tag questions are sometimes added to the end of imperatives:
Leave your coat in the hall, will you?
Write soon, won't you?
In an imperative sentence, the main verb is in the base form. This is an exception to the general rule that matrix clauses are always finite.  

Imperatives exerciese

Rewrite the sentences in imperative. Keep the same meaning.

Example:You can't step on the grass. - Don't step on the grass.
We must revise some new words. - Let's revise some new words.
He should have a job. !
We mustn't stop now. !
You must go to bed. !
You should get up early. !
You mustn't stand here. !
She can have a drink. !
They must clean the carpet. !

วันเสาร์ที่ 11 ธันวาคม พ.ศ. 2553

Present Simple Tense

Present tense

A present tense (abbreviated pres or prs) is a grammatical tense that locates a situation or event in present time. In English, the present may be used to express action in the present, a current state of being, an occurrence in the future, or an action that started in the past and continues.




" How to use Present Simple Tense "



Form of the Simple Present Tense

We add -s or -es to the base form of the verb in the third person singular.

I work >
You work >
He works >
She works >
It works > in an office.
We work >
You work >
They work >
Uses of the Simple Present Tense

Permanent truths

We use the Simple Present for statements that are always true:

Summer follows spring. Gases expand when heated.


The present period'

We use the Simple Present to refer to events, actions or situations which are true in the present period of time and which, for all we know, may continue indefinitely. What we are saying, in effect, is 'this is the situation as it stands at present':
  
My father works in a bank. My sister wears glasses.

Habitual actions

The Simple Present can be used with or without an adverb of time to describe habitual actions, things that happen repeatedly:
  • I get up at 7. John smokes a lot.
We can be more precise about habitual actions by using the Simple Present with adverbs of indefinite frequency (always, never, etc.) or with adverbial phrases such as every day:
  • I sometimes stay up till midnight.
  • She visits her parents every day.
We commonly use the Simple Present to ask and answer questions which begin with How often?:
  • How often do you go to the dentist? - I go every six months.
Questions relating to habit can be asked with ever and answered with never:
  • Do you ever eat meat? - No, I never eat meat.
 
Future reference
This use is often related to timetables and programmes or to events in the calendar:
  • The exhibition opens on January 1st and closes on January 31st.
  • The concert begins at 7.30 and ends at 9.30.
  • We leave tomorrow at 11.15 and arrive at 17.50.
  • Wednesday, May 24th marks our 25th wedding anniversary.
Observations and declarations

We commonly use the Simple Present with stative and other verbs to make observations and declarations in the course of conversation: e.g.
  • I hope/assume/suppose/promise everything will be all right.
  • I bet you were nervous just before your driving test.
  • It says here that the police expect more trouble in the city.
  • I declare this exhibition open.
  • I see/hear there are roadworks in the street again.
  • I love you. I hate him.
  • We live in difficult times. - I agree.

Simple Present Tense in adverbial clauses of time: 'no future after temporals'
When the time clause refers to the future, we normally use the simple present after after, as soon as, before, by the time, directly, immediately, the moment, till, until and when where we might expect a Simple Future.
  • The Owens will move to a new flat when their baby is born.
  • I will go to the cinema after I finish my homework.
  • You will get the dessert as soon as you finish your dinner.
Present Simple Tense Song




Reference:



วันศุกร์ที่ 3 ธันวาคม พ.ศ. 2553

Preposition

What is Preposition ?

Definition: Prepositions are a class of words that indicate relationships between nouns, pronouns and other words in a sentence. Most often they come before a noun. They never change their form, regardless of the case, gender etc. of the word they are referring to.

Some common prepositions are: 
about       by            outside
above      despite      over
across     down        past
after        during       since
against     except      through
Prepositions typically come before a noun:
For example:
  • after class
  • at home
  • before Tuesday
  • in London
  • on fire
  • with pleasure

A preposition usually indicates the temporal, spatial or logical relationship of its object to the rest of the sentence.
For example:
  • The book is on the table.
  • The book is beside the table.
  • She read the book during class.

    In each of the preceding sentences, a preposition locates the noun "book" in space or in time.

Prepositions are classified as simple or compound.
Simple prepositions
Simple prepositions are single word prepositions. These are all showed above.
For example:
  • The book is on the table.

Compound prepositions
Compound prepositions are more than one word. in between and because of are prepositions made up of two words - in front of, on behalf of are prepositions made up of three words.
For example:
  • The book is in between War and Peace and The Lord of the Rings.
  • The book is in front of the clock.

Examples:
  • The children climbed the mountain without fear.
  • There was rejoicing throughout the land when the government was defeated.
  • The spider crawled slowly along the banister.
The following table contains rules for some of the most frequently used prepositions in English:

Prepositions of Time:
-  on               day of the week                  on Monday
-  in               months / seasons                  in August / in winter
                     time of day                           in the morning
                     year                                     in 2006
                     after a certain period            in an hourat
                     of time (when?)
  - at              for night                             at night                   
                     for weekend                       at the weekend
                     a certain point                     at half past nine
                     of time (when?)

Prepositions of Place:

  • in                room, building, street, town, country       in the kitchen, in London

  •                       book, paper etc.                                     in the book
                          car, taxi                                                  in the car, in a taxi                
                          picture, world                                         in the picture, in the world 
    - at                 meaning next to, by an object               at the door, at the station
                          for table                                                at the table
                          for events                                               at a concert, at the party
                          place where you are to do                      at the cinema, at school,at work
                          something typical (watch a film, study,work)
    - on                attached                                                the picture on the wall
                          for a place with a river                           London lines on the Thames
                          being on a surface                                  on the table
                          for a certain side (left, right)                    on the left
                          for a floor in a house                               on the first floor
                          for public transport                                 on the bus,on a plane
                          for television, radio                               on tv, on the radio

    Preposition Song



    
    Complete the exercise according to the picture.

  • the picture, I can see a woman.

  • The woman is sitting a table.

  • She is sitting a chair.

  • There is another chair the woman.

  • Her feet are the table

  • The woman is holding a cup her hands.

  • the table are a laptop, a paper, a calculator, an appointment calendar, two pens and a muffin.

  • The woman is looking her laptop.

  • The woman's bag is the table.



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    Reference
    http://www.englishlanguageguide.com/english/grammar/preposition.asp
    http://www.ego4u.com/en/cram-up/grammar/prepositions
    http://www.ego4u.com/en/cram-up/grammar/prepositions/exercises?07