最常见的是宾语从句，that大多可以省略，如I
think
(that)
you
will
like
it.
定语从句中，先行词在从句里作宾语时，that可以省略，如
She
is
the
girl
(that)
I
mentioned.
在so...that和such...that的句型中，也可以省略，如
I
have
gone
through
such
a
busy
day
(that)
I
am
totally
exhausted.
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