英语He must have come back home last night,( )?

发布网友 发布时间:2024-10-23 18:21

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热心网友 时间:2024-11-01 19:39

3)
陈述句含有情态动词must有两种情况:
must表示“必须”,反意疑问句部分为mustn’t…?
/
needn’t…?
He
must
study
hard
at
English,
mustn’t
he?
/
needn’t
he?
You
must
go
home
now,
needn’t
you?
/
mustn’t
you?
We
mustn’t
be
late,
must
we

Must表示推测:“一定,肯定”
反意疑问句部分与must后面的动词呼应
You
must
be
joking,
aren’t
you?
He
must
be
ill,
isn’t
he

注意:用must对过去的动作推测时,反意疑问句部分的助动词用did或have,
而对过去的状态推测,反意疑问句部分的be动词用was:
She
must
have
finished
her
work,
hasn’t
she

/
didn’t
she

Jack
must
have
arrived
here
yesterday,
didn’t
he

He
must
have
been
a
policeman,
wasn’t
he

所以CA
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