初中要用的情态动词都有什么?能详细讲一下吗?

一、考查情态动词表示“推测”的用法

[考点快忆] 表示肯定推测的情态动词有：must“一定；准是”，may“也许；可能”，might“或许”；表示否定推测的情态动词有：can't“不可能”， couldn't“不会”，may not“也许不”，might not“或许不”；can表示推测时不用于肯定句，may表示推测时不用于疑问句。

【中考题例】 1. The light in the office is off. The teacher ______ be there now. (南通市 2004)

A. mayB. can'tC. mustn'tD. must

(划线处为答案，下同)

2. Susan's parents have bought a large house with a swimming poo1. It_______be very expensive. (上海市2003)

A. must B. can C. mustn't D. can't

二、考查情态动词引起的一般疑问句的答语

[考点快忆] 回答must时，肯定答语用must,否定答语用needn't或don't have to。回答need时，肯定答语用must,否定答语用needn't。回答may时，肯定答语用may，否定答语用mustn't 或can't。

【中考题例】

1. —May I take this book out of the reading room?

— ______ . Please read it here. (四川省2004)

A. CertainlyB. No, you needn't

C. No, you mustn't

2. —May I use your dictionary?

— _