1、第三讲情态动词语法规则再现情态动词含义示例cancould(指过去时间)(1)表能力，意为“能，能够，会”(2)表可能(理论或逻辑判断)(3)表示请求(4)表示对现在状态或动作进行猜测(否定句或问句) He can speak English fluently.He can compete in the football match if time permits.Can you help me with my Chinese?Mary cant be in the classroom now.She is injured at home.maymight(1)表允许(2)表可能I may g
2、o hiking if I finish my homework.It may rain soon.must(have to表客观需要)(1)表必须(肯定句)(2)表揣测，意为“想必，准是，一定”I must go home now.My mother must be exhausted now，because she walked a long time.shouldought to(1)表责任或义务，意为“应该”(2)表推测，意为“照说应该，估计”You should do what you are asked to do.Children ought to be able to read
3、 by the age of 7.shall在疑问句中征求意见(主语是I，we，he)Shall we go to the museum after class？willwould(1)表意愿(2)表请求(第二人称)(3)表过去的习惯I will do it well for you.Would you please open the door?He would swim when he was young.典型例题分析1(2019年青岛模拟)What do you think of Betty?Lovely，though she be naughty sometimes.can考查情态动词。
4、句意：你认为贝蒂如何？很可爱，尽管她有时候会很调皮。can表示“有时候可能会”的意思。2(2019年兰州一月调研)Im Captain John Blanchard.You be Miss Hollis.I am glad to meet you here.must考查情态动词。你一定是Hollis女士。根据语境可知此处要用must表示肯定的推测。语法专项对练单句语法填空1Cant you stay a little longer?Its getting late.I really must go now.My daughter is home alone.2It was so noisy t
5、hat we could not hear ourselves speak.3You must be Carol.You havent changed a bit after all these years.4You may feel all the training a waste of time，but Im a hundred percent sure later youll be grateful for what you did.5You must be careful with the camera.It costs!6I would stay at home rather tha
6、n go shopping.7Shall we have a cup of tea here?Thats a good idea.8Would you close the window for me?Certainly.9The man with a cap must be Toms father.I have seen him before.10The traffic is heavy today；I might arrive a bit late，so could you save me a place?11You should study harder than before，because the final exam is coming.