一般现在时 现在完成时 过去进行时 概念构成标志词

Question

如题所述

Answer 1

定语从句：I
don't
know
the
man
whose
coat
is
black.
过去完成时:She
said
that
she
had
finished
her
homework.
被动语态:The
workers
are
made
to
work
at
mid-night.
不定式用法:I'm
free,
and
I
have
nothing
to
do.
有一种语态叫过去完成进行时，由“have/has+been+现在分词”构成。表示动作从过去某一时间开始，一直延续到现在，可能还要再继续。
例如：他们一直在为会议做准备。（现在仍在继续）
They
have
been
preparing
for
the
meeting.