Question

现在完成时中been应该怎么用？

Answer 1

一.have/has
been
doing
sth.
1.现在完成进行时
当后面接有一段时间的词时,或是加表示时间的词时,可以用现在完成时.如果这件事现在还在持续或还在做,则可用
现在完成进行时.
如:i
have
been
skating
for
4
hours.
i
have
finished
my
homework.
2.现在完成时的被动语态.
后接动词的过去分词.
如:the
building
has
been
built
for
5
years.

Answer 2

一.have/has
been
doing
sth.
1.现在完成进行时
当后面接有一段时间的词时,或是加表示时间的词时,可以用现在完成时.如果这件事现在还在持续或还在做,则可用
现在完成进行时.
如:I
have
been
skating
for
4
hours.
I
have
finished
my
homework.
2.现在完成时的被动语态.
后接动词的过去分词.
如:The
building
has
been
built
for
5
years.
二.一般现在时:用动词原形
一般过去时:用动词的过去式
一般将来时:will/shall+do
is/am/are
going
to
do
过去将来时:could/would
do
现在完成时:have/has
done
过去完成时:had
done
将来完成时:shall
have
done
过去将来完成时:would/could
have
done
现在进行时:is/am/are
doing
过去进行时:was/were
doing
将来进行时:will/shall
be
doing
过去将来进行时:would/could
be
doing
现在完成进行时:have/has
been
doing
过去完成进行时:had
been
doing
将来完成进行时:shall
have
been
doing
过去将来完成进行时:would
have
been
doing