have to 和must 有什么区别？分别造句

Question

如题所述

Answer 1

楼主，你好

1)
两词都是'必须'的意思，have
to
表示客观的需要，
must
表示说话人主观上的看法，既主观上的必要。
my
brother
was
very
ill,
so
i
had
to
call
the
doctor
in
the
middle
of
the
night.
我弟弟病得很厉害，我只得半夜里把医生请来。(客观上需要做这件事)
he
said
that
they
must
work
hard.
他说他们必须努力工作。（主观上要做这件事）
2)
have
to有人称、数、时态的变化，而must只有一种形式。但must
可用于间接引语中表示过去的必要或义务。
he
had
to
look
after
his
sister
yesterday.
3）
在否定结构中：
don't
have
to
表示"不必"
mustn't
表示"禁止"，
you
don't
have
to
tell
him
about
it.
你不一定要把此事告诉他。
you
mustn't
tell
him
about
it.
你一定不要把这件事告诉他。

望采纳！