第1个回答 2020-03-30
isn't
she?
must反义疑问句就三种可能:
①must
②needn't
③变换句式
下面来讲一讲他们分别的用法,一般考试就这三种可能!
1、mustn't→must
mustn't在陈述句中的意思一般是不允许,禁止,所以他的反义疑问句用must或may
例:You
mustn't
smoke
here,
must
you?或may
you?
2、必须→needn't
当must在陈述句中作“必须”解时,它的反义疑问句就变成needn't
例:You
must
go
now
,needn't
you?
3、变换句式
在must表示推测,做“一定,准是”,简单的说就是must用于虚拟语气时
像数学一样我们引入一个“常量”——I
am
sure
that
例子:
He
must
have
come
yesterday.
变换句式作
I
am
sure
that
he
came
yesterday.
我们应该分清,反义疑问句问的应该是I
am
sure
that
后面的从句
所以,按照一般反义疑问句的规则得出结果
I
am
sure
that
he
came
yesterday,
didn't
he?
最后再把句子还原
He
must
have
come
yesterday,didn't
he?
第2个回答 2019-09-11
这是语法要求啊,背过就好了。
如果陈述部分的主语是
I’m…
结构,反意疑问句的附加部分一般用
aren’t
I
。
例如:
I
am
a
teacher,
aren’t
I
而且要记住,就算前面是I
am
not
开头
后面也要用aren't
I?
比如:I
am
as
tall
as
your
sister,aren’t
I?我跟你姐姐一样高,对吗?
换言之,若前面是否定陈述:
I
am
not
as
tall
as
your
sister,aren’t
I?我跟你姐姐不一样高,对吗?