首先,这句话填
who。如果这句话变成了
________moved
me
most
were
what
the
teachers
had
done.这句话就应该填what。因为原句后面只有人,那主句肯定也应该落在人上。但是我改的句子后面说的是人做的事,落点是在事情上,因此用what。这样你就明白what和who引导的主语从句有什么不同。
That
he
is
a
teacher
is
known
to
us
all.和It
is
known
to
us
all
that
he
is
a
teacher.这两句话是完全相等的。只不过前一句that从句在前,后一句that从句在后了,用了一个It来做形式主语
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