文档介绍：现在完成时讲解及练****题(含答案)
时态讲解：现在完成时
（1）构成：现在完成时由助动词have + 过去分词构成，助动词have 有人称和数的变化。第三人称单数用has，其余用have.
现在完成时 twice, ever, never等连用。例如：
She has already come. 她已经来了。
I haven’t read it yet. 我还没读过这个。 I have met him before. 我从前曾见过他。 Ma Hong has always been a good student. 马红一直是个好学生。 I have often seen him in the street. 我经常在街上看见他。 They have never been to Yan’an. 他们从未去过延安。 I haven't seen him lately. 我近来没看到他。
Irregular Verbs
Base Form
Past Form
Past Participle
bear
bore
born
beat
beat
beaten
become
became
become
blow
blew
blown
bring
brought
brought
build
built
built
buy
bought
bought
catch
caught
caught
choose
chose
chosen
come
came
come
do
did
done
drink
drank
drunk
drive
drove
driven
eat
ate
eaten
fall
fell
fallen
find
found
found
fly
flew
flown
get
got
got
give
gave
given
go
went
gone
grow
grew
grown
have
had
had
hear
heard
heard
keep
kept
kept
leave
left
left
lose
lost
lost
make
made
made
put
put
put
read
read
read
run
ran
run
say
said
said
see
saw
seen
sell
sold
sold
send
sent
sent
sing
sang
sung
sink
sank/sunk
sunk
take
took
taken
teach
taught
taught
write
wrote
wrote
am, is
was
been
are
were
been
Exercise:
I. Fill in the blanks with the proper form.
1. I____ already ____ (see) the film. I ________ (see) it last week. 2. _____ he ____ (finish) his work today? Not yet.
3. My father ____ just ____ (come) back from work. He is tired now. 4. Where’s Li Ming ? He __________ (go) to the teacher’s office.
5. I __________ (work) here since I ______ (move) here in 1999. 6. So far I _______________(make) quite a few friends here.
7. How long ________ the Wangs ______________(stay) here ? For two weeks. 8. I ________ just ___________ (finish) my homework.
9. He ________ (go) to sch