Everyone knows the answer， don‘t they?　(does he?)

Nobody knows about it， do they? (does he?)

16) 带情态动词dare或need的反意疑问句，疑问部分常用 need (dare ) +主语。

We need not do it again， need we ?

He dare not say so， dare you?

当dare， need 为实义动词时，疑问部分用助动词do + 主语。

She doesn’t dare to go home alone， does she?

17)　省去主语的祈使句的反意疑问句，疑问部分用will you。

Don‘t do that again， will you?

Go with me， will you / won’t you ?

注意： Let‘s 开头的祈使句，后用shall we?

Let us 开头的祈使句，后用will you?

Let’s go and listen to the music， shall we?

Let us wait for you in the reading-room， will you ?

   18)　陈述部分是“there be”结构的，疑问部分用there省略主语代词。