Question

宾语从句引导词what和that的区别

Answer 1

定语从句引导词即连词中没有what.
有that,who,
which,whose,whom,where
等。
1当先行词为人时用who或that
.
如：He
is
the
man
that
/who
likes
playing
basketball.
2当先行词为物时用which
或that.
如：The
book
which
/that
I
bought
yesteday
is
very
interesting.
总之，what
引导的是宾语从句而不是定语从句。如：I
don't
know
what
I
should
do
next.

Answer 2

that
在从句中不作成分，没有意思。一般可以省略。
e.g
i
don't
know
(that)
you
pass
the
exam.
what
在从句中可以作主语，宾语，或者表语。翻译为“什么”或者“所...的”
e.g
i
don't
know
what
i
should
say.
在这个例句中what做了say的宾语。