Auxiliary Verb

                 

   
What are auxiliary verbs?   

Do - Does - Did

Do is used with the present simple tense. Do-Does are used as part of the sentence structure for negative statements/sentences with the present simple tense

Do- Does are used as part of the sentence structure for questions, with the present simple tense.

Did is used with the past simple tense.

Did is used as part of the sentence structure for negative statements/sentences with the past simple tense

Did is used as part of the sentence structure for questions, with the past simple tense.

Be - Am - Is - Are -Was - Were

Have - Has -Had

DO', 'BE' and 'HAVE' are the English auxiliary verbs used in a negative structure, a question or to show tense.

DESCRIPTIONS OF ENGLISH AUXILIARY VERBS:

1. 'DO', 'DON'T', 'DOES' and 'DOESN'T' are used for questions and negatives in the Present Simple Tense, and 'DID' and 'DIDN'T' are used in the Past Simple Tense.

2. 'BE' is used with the Present Participle in Continuous (Progressive) Verbs. It is also used with the Past Participle in the Passive.

3. 'HAVE' is used with the Past Participle to form the Perfect Aspect.

      

They are used to form the passive voice.

They are used to form the continuous tense.

They are used to form the perfect tense.

Be, Do and Have are auxiliary verbs, they are irregular verbs and can be used as main verbs. The verbs 'to be' and 'to have' are the most commonly used auxiliary verbs and work alongside the main verbs in any statement.

Modal verbs are also auxiliary verbs, but will be treated separately, these are can, could, may, might, must, shall, should, will, and would, they differ from the others in that they can never function as a main verb.

To be

Be is the most common verb in the English language. It can be used as an auxiliary and a main verb. It is used a lot in its other forms.

Base form = be

Present form = am/is/are

Past form = was/were

Present Participle / Gerund = being

Past Participle = been

More on the Verb To Be

   Exercise


1.We ____ done it yet.

don't
didn't
hasn't
haven't

2. ____ you think they are coming tonight?

Do
Does
Did
Have
Has

3.____ you see them yesterday?

4.I ......... forgotten to set my alarm clock, so I was late for my train.

Do
Did
Have
Has

	(a)  was
	(b)  were
	(c)  did
	(d)  had

5.......... it raining when you left your office this afternoon?

	(a)  Was
	(b)  Were
	(c)  Did
	(d)  Had

6.The employees ......... informed last night that their company was going into receivership.

	(a)  was
	(b)  were
	(c)  did
	(d)  had

7.The police located the art work which ......... been stolen from the gallery.

	(a)  was
	(b)  were
	(c)  did
	(d)  had

8.The fire ......... caused by an electrical problem.

	(a)  was
	(b)  were
	(c)  did
	(d)  had

9.She was surprised that he knew her name. She ......... never met him before.

	(a)  was
	(b)  were
	(c)  did
	(d)  had

10.How many times ......... your travel documents checked before you boarded the airplane?

	(a)  was
	(b)  were
	(c)  did
	(d)  had

References

http://webcache.googleusercontent.com/search?q=cache:gqJ4EyTbCr0J:www.english-test.net/esl/learn/english/grammar/ei095/esl-test.php+&cd=2&hl=th&ct=clnk&gl=th

http://webcache.googleusercontent.com/search?q=cache:MB8HZYsC7t8J:www.english-the-easy-way.com/English_ESL/Auxiliary_Verbs.htm+auxiliary+verb&cd=4&hl=th&ct=clnk&gl=th


http://webcache.googleusercontent.com/search?q=cache:YkZXZ89CQEwJ:www.usingenglish.com/quizzes/42.html+auxiliary+verb+exercise&cd=8&hl=th&ct=clnk&gl=th

   More  Video


  http://www.youtube.com/watch?v=S5Drs2UuB2Y