虚拟语气中had done与would have done，did与would do 的用法有何区别

Question

如题所述

Answer 1

当主句与if条件句中的动作都发生在过去时,主句谓语动词就要使用had
done形式,if条件句中谓语动词则要使用would
have
done形式
。e.g.If
I
had
worked
hard,I
would
have
passed
all
the
exams.
当主句以及if条件句中的动作都发生在现在时,主句的谓语动词必须使用did(be动词用were),if条件句动词须使用would
do形式。e.g.
If
he
came
on
time
for
the
meeting,I
would
treat
you
to
a
rich
meal.
If
I
were
you,I
would
go
with
him.
当主句和if条件句的动作都发生在将来时,主句动词可以使用did,should
do
或were
to
do形式,if条件句中动词须使用would
do形式.
e.g.If
you
kept/should
/
keep
were
to
keep
your
promise,you
would
earn
more
than
trust.

Answer 2

当主句与if条件句中的动作都发生在过去时,主句谓语动词就要使用had
done形式,if条件句中谓语动词则要使用would
have
done形式
。e.g.if
i
had
worked
hard,i
would
have
passed
all
the
exams.
当主句以及if条件句中的动作都发生在现在时,主句的谓语动词必须使用did(be动词用were),if条件句动词须使用would
do形式。e.g.
if
he
came
on
time
for
the
meeting,i
would
treat
you
to
a
rich
meal.
if
i
were
you,i
would
go
with
him.
当主句和if条件句的动作都发生在将来时,主句动词可以使用did,should
do
或were
to
do形式,if条件句中动词须使用would
do形式.
e.g.if
you
kept/should
/
keep
were
to
keep
your
promise,you
would
earn
more
than
trust.