文档介绍：过去分词的构成
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Type
original

cut
cut
cut
hit(撞击)
hit
hit
cost
cost
cost
hurt
hurt
hur
Key words
Have been
yet
already
ever
never
注意： ever 曾经用于疑问句中
never 从不带有否定意义
I ______ just ________ the desk, you can take it to your classroom . (mend )
Key words
have mended
yet
ever
never
just
already
Just 刚刚与现在完成时连用一般置句中
Just now 刚才与一般过去时连用
Tom ___________ in the factory since he left school ten years ago. (work )
Key words
has worked
yet
ever
never
since
already
since 后面带过去时间或有一般过去时的句子
A: How long ______ you ________ in this school? (teach )
B: For 6 years.
Key words
have taught
yet
ever
never
since
for
already
+ 一段时间
We _______ only ____________ 100 trees so far. (answer )
Key words
have planted
yet
ever
never
since
for
just
already
so far
到目前为止
Key words
yet
ever
never
since
for
just
before
already
so far
in the past 10 years
twice
也可以是其他表示次数的词
how long
since: (自…以来)
1)since+时间点
He has stayed here since 5 o’clock.
2)since+ 时间段+ ago
He has stayed here since 5 hours ago.
3)since+ 从句
She has taught English since he came here.
for: (长达）
for+ 时间段
He has kept the book for 2 weeks.
since , for 的用法:
Take notes
用for 或since填空
Mr. Brown has had his TV ________ 15 years.
I’ve taken driving lessons _________ last month.
My sister has had her cell phone ________ a month .
My friends haven’t visited me ___________ my birthday.
We haven’t used our car ________ a long time .
She hasn’t had a good cup of coffee _________ years.
Tom has worn glasses _________ he was 7 years old.
for
since
for
since
for
for
since
实义动词分为: 1) 瞬间动词
2)延续动词
瞬间动词
join
begin/start
borrow
finish/end
arrive/come
leave
die
buy
注意: 瞬间动词不能和时间段连用.
Some verbs can't often be used with "for" or "since"
He has