3. An auxiliary verb is used
to add functional or
grammatical content to
expressed by another
verb, considered to be
the main verb.
4. Are function words, a type
of closed class which is
constituted of words that
have grammatical function
as opposed to content
words, which are open
class of lexical words.
• I am writing a book.
• He has done the work.
• We will be there in a minute.
• Would you help me with
• Can you open the door?
• Did you visit New York last
• Do you like chocolates?
• They must get there on time.
6. The 23 Auxiliary Verbs
Am Is Are
Has Have Had
Do Does Did
May Might Must
Be Been Being
7. Uses of Auxiliary Verbs in a
Statements and Questions
Do/ does/ did
Do is common for forming
questions and making
negatives. Did is used for do
and Does in the past tense.
Do is never used for the past
8. Be= am/is/ are
Be can be used as an auxiliary verb or the
main verb in a sentence. Is tells us that an
action is happening now or is going to
happen in the future. Be is also used to
make passives. Are is used for they
and we. Was is used for the past
tense of am and is. Were is used for
the past tense of you, we and they.
9. Have= has/ had
Have is used to make the perfect
tense(it always followed by the past
participle). Has is used for the third
person singular. Had is used for past
tenses especially the past perfect
tense. It describes an action that
began in the past and continues
into the present or that occured in
the recent past.
10. Other Common Auxiliary Verbs
Can Could May Might
Must Ought Should would
These are also known as modal
verbs. We used them to show
obligation, possibility and necessity.
12. Directions: Tell whether if the bold
word in the sentences is an auxiliary
or a full verb.
1. Dad is working in the garden.
2.We do the shopping once a week.
3.These students never have classes on
4.What do you do for a living?
5.The kids were dancing to the music.
13. 6.Did you see him?
7.The door is closed.
8.Where have you been?
9.My parents are on holiday.
10.I had just finished my
breakfast when the phone rang.