第1个回答 2020-01-15
只表示过去的一个时间,用一般过去时。如
I
bought
a
book
yesterday.
如果是一个具体的过去时间用过去进行时如
We
were
having
a
math
class
at
ten
yesterday.
第2个回答 2019-02-22
有过去标志的比如yesterday
,
last
week等,用过去式
完成时用过去分词
第3个回答 2020-04-29
1.过去做过的用过去式,比如说:i
did
my
homework
last
night.
2.过去的过去用过去分词,不如说:he
told
us
that
he
had
finshed
his
homework.
3.过去对现在有影响用现在分词,比如说:he
has
finshed
his
homework
already.希望对你有帮助!!!
第4个回答 2019-10-19
一般过去时用过去式
过去分词用于完成时,被动语态或做后置定语