I:

do->did->done

go->went->gone

take ->took->taken

read->read->read

learn->learned->learnt

speak->spoke->spoken

buy->bought->bought

catch->caught->caught

put->put->put

meet->met->met

make->made->made

know->knew->known

see->saw->seen

hold->held->held

send->sent->sent

build->built->built

grow->grew->grown

spend->spent->spent

cut->cut->cut

II

1.since                      6.for

2.since                      7.since

3.since                      8.for

4.for                          9.sincce

5.since                      10.for

III

1.have heard

2.have just told

3.has been

4.Have you finished

5.have had

6.has known

7.hasn't met

8.have never saw

IV

1.has just sent

2.visited

3.has lived

4.went

5.have learnt/was

6.has played

7.have already read

8.hasn't saw

9.has played/played

V

He has a coldfor a week.