she must have been forty. 变反意疑问句！求答案！

Question

They must have seen the film.反意疑问句
The old man must have been a Swedish.否定句
My father must have gone to work.反意

Answer 1

改反意疑问句：
she must have been forty，hasn't she？
They must have seen the film，haven't they？
My father must have gone to work，hasn't he？
参考1：
当陈述部分有情态动词must， 且是must+have done结构 表示对过去的情况进行推测（一般句中有明确的过去时间状语），问句要根据陈述部分谓语的情况用“didn't+主语”或“wasn't/weren't+主语”；如果强调动作的完成（一般没有明确的过去时间状语），问句要用“haven't/hasn't+主语”。 　
She must have read the novel last week,didn't she? 　　
她上星期一定读了这本小说，是吗？
You must have told her about it,haven't you?

The old man must have been a Swedish.
改否定句
The old man can't have been a Swedish.
参考2：
. must的否定形式表示“禁止/不许”，不能表示推测；
mustn't have done sth此种形式的确不存在，
must have done sth“一定做过某事”的否定形式是can't/couldn't have done sth，
意思是“不可能做过某事”。

希望能够帮到你 学习愉快……

Answer 2

she must have been forty,mustn't she 这里是推测所以前肯后否，否地must

Answer 3

wasn't she?