ENGLISH

SIMPLB SIMPLE PAST
FORM PAST PARnClPLB
be was, were been
know knew known
have had had
see saw men
teach taught tcnrPht
live lived lived
own omd owwd
work wmM worked
touch touched touched
(a) I have knaun Tom for five years.
(b) Sue had had a bad cold for three days.
(c) They have liwd here since 1994.
(d) We have owned our own home since 1989.
(e) I've
Webe
You've
W v e
She's
He's
It's
COMPARE
( f) She's been here for two months,
Form of the present perfect:
havelhcrs + past pam'n'ple
Irregular verbs have irregular past participles. (See
Chart 10- 18 and Appendix 5 for additional lists of
irregular verbs.)
The past participle of xegular verbs is the same form
as the simple past:
verb + -ed
Notice in the examples:
The present perfect is formed by
have 1 has + past participle.
Have and has are contracted with subject pronouns
as shown in the examples.
In (f): she's = she has
In (g): she's = she is
EXERCISE 29: Complete the sentences with the given verbs. Use the PRESENT PBRFFXT.
1. teach
2. know
Mr. Jackson is a teacher. He 'S taught biology for twenty years.
I
Mary Adams since I was a child.
?
She
a good friend for a long time.
w
My parents live in a suburb of Mexico City, They
5. have
6. work
7. be
Janet and Sam
My uncle
seventeen years.
We
in the same apartment for twenty-five years.
their dog Fido for three years.
at the automobile factory for
in class since nine o'clock this morning.