Revision for Modal Verbs Teacher: Hu YiLei School: Jinling Middle School Students: Class One, Senior Three

Revision on Basis Uses of Common Modals Basis Uses of Common Modals MUST may need CAN SHOULD MIGHT COULD

Complete the tips with “can, may, must, should,need” “can, may, must, should,need”

 Flu, Don’t worry Many people_____ catch a cold in the spring or the fall. There are some ways to prevent it: may

 1. Cover your nose and mouth with a tissue when you cough or sneeze. You _______ throw the tissue everywhere after you use it. And clean your hands afterward, noticing that viruses________ remain infectious( 传染 性 ) for hours. mustn’t may

 2. Wash your hands often with soap and warm water, especially after you cough or sneeze. Alcohol-based gel hand cleaners ________ inactivate( 减除 … 活性 ) viruses. can

 3. Avoid touching your eyes, nose or mouth. Germs ______spread this way and consider buying a mask in case you ________it in the future. may need

 4. At home, you ________ usually clean your room. keeping house air circulation_______ reduce the spread of virus. should can

 5. By eating food rich in vitamin C to improve your natural immunity( 免疫力 ). * if you _____ take vitamin C pills, please ensure tablets containing zinc ( 锌 ) to promote( 促进 )absorption of vitamin C. must

 6. Those who show physical discomfort, the symptom of high fever, cough _____ stay in the home, and at least 1 meter with others maintain, seek medical advice immediately. must

 Put these tips into practice and you_________ be infected with the terrible flu! may not

‘ must be may be can’t be StructureMeaning 肯定是 … 可能是 … 不可能是 …

It can’t be… It may be… It must be… It is a hat.

It can’t be… It may be… It must be… It is a mobile phone.

The person can’t be… The person may be… The person must be…

‘ must be doing may be doing can’t be doing StructureMeaning 肯定（正在） … 可能（正在） … 不可能（正在） …

What is she doing? 1 She can’t be doing… She may/must be doing…

What is she doing? 2 She can’t be doing… She may/must be doing…

What is she doing? 3 She can’t be doing… She may/must be doing…

A cat may have walked on the paper. A small dog must have done this. An elephant can’t have made these marks.

‘ must have done may have done can’t have done StructureMeaning （过去）肯定 … （过去）可能 … （过去）不可能 …

‘ must be doing may be doing can’t be doing Meaning 肯定 … 可能 … 不可能 … 对 ? 表猜测 must have done may have done can’t have done Structure 对 ? 表猜测 对现在正在进行 的动作表猜测 对过去已经发生 的动作表猜测

A:where’s Peter? B: I don’t know. He_______in the teachers’ office. A: He_______there, for I was there just now. C: I know where he is. He is ill and _____________ the doctor now. may be can’t be must be seeing

 A: What’s the matter with him?  C: He had a sore throat and coughed with high fever.  A: He _______________a bad cold.  B: Really? He is not himself all these days. I’m afraid that he______________with H1N1. must have caught may be infected

 A: Oh, he ________________ travelling outside last weekend, or he wouldn’t have got ill. These days, everyone ____________(talk) about this virus.  C: But we ___________ too nervous. It ________that bad, for we have done our best to prevent it from spreading.  B: Hope so. How I wish he _________________ recover soon. shouldn’t have gone may be talking needn’t be can’t be could/would/might

Homework Finish the exercise paper after you review what you have learned in the class.

Revision for Modal Verbs