关于that后从句的用法

that引导的宾语从句（在非正式场合that可以省略）例句：I
don’t
think
it
is
right
for
him
to
treat
you
like
that
在以下情况中that不能省略当句中的动词后接多于两个由that引导的宾语从句时，第一个that可省，但后面的that不可省。例句：He
said
(that)
you
were
too
young
to
understand
the
matter
and
that
he
was
asked
not
to
tell
you.
当主句的谓语动词与that宾语从句之间有插入语时，that一般不可省。例句：Just
then
I
noticed,
for
the
first
time,
that
our
master
was
wearing
his
fine
green
coat
and
his
black
silk
cap.当that从句是双宾语中的直接宾语时，that不可省。例句：I
can’t
tell
him
that
his
mother
died.
注意事项：许多带复合宾语的句子，that引导的宾语从句经常移到句子后部，而用it作形式宾语。例句：I
find
it
necessary
that
we
should
do
the
homework
on
time.