1、我们以一个题目引入今天的情态动词：Is Toby coming by bus?He should, but he___not. He like driving his car.A. mustB. canC. needD. may
3、我们以几个例子来进行介绍。A. We must learn Math well.这是一种愿望B. You should have some rest. 这是在表达一种建议。潮贾篡绐C. May I use your book?这在表达一种请求。
5、第二点，有些只用在疑问句或者否定句中。比如：Need I say more?You need not do it.
7、还有些情态动词，必须和后面的动词原形构成谓语。如，We can be there on time .You may ask the teacher.
