1）“肯定陈述＋否定疑问”：be 动词+ not + 主语
Your sister is a nurse,isn't she?
2）“否定陈述＋肯定疑问” ：be 动词+ 主语
we aren`t students,are we?
3）省去主语的祈使句的反意疑问句,疑问部分用will you.
close your book ,will you?
4）Let's 开头的祈使句,后用shall we（或用shan't we)
Let us 开头的祈使句,后用will you（或won't you）?
don`t play in the class,shall we?