9.陈述部分带有情态动词used to时，附加疑问句可用used to形式或did形式.

　　The Allens used to live in the country, usedn’t they/didn’t they?

　　10.Let us go home, shall we?

　　Let us go there, will you?

　　Don’t forget to close the door, will you?

　　Come in, will you/won’t you?

　　考试重点：出现’s和‘d时关键是判断是什么缩写形式。例如：

　　It’s a long time since we met last time, _______?

　　It’s been a long time since we met last time, ________?

　　He’d better come to the interview in time, ________?

　　I’d rather you went go there now, ________?

　　isn’t it

　　hasn’t it

　　hadn’t he

　　wouldn’t I