初中英语人教新目标 (Go for it) 版九年级全册Section A课前预习ppt课件

Teaching Procedures

Tips

Step 1 Warming up

       Review

Show pictures relate to 1b (volleyball, Harry Potter, music CD, toy truck, magazines) to Ss. Ask them to think about who these things belong to and why.

T can encourage Ss to use modal verbs to make inference.

Step 2 Presentation & Practice

Grammar Focus

       Ask Ss to read the sentences in the box and tell them that we can make inferences using modal verbs.

情态动词表示推测

情态动词can, could, may, might, must可以用来表示对发生或存在的事情的推测。这里could和might不是过去时，推测的语气不如can, may强; must表示推测时语气最强，意为“肯定，断定”。

情态动词的推测程度为：

may / might表示“有可能；大概”，might的语气比may要弱，相当于perhaps; can / could表示“或许”，其可能性比may / might要小，相当于possibly; must的可能性最强，语气较肯定。

表示对现在及将来状态、动作的推测

1.当表示对现在及将来状态的推测时，一般用can / could, may / might, must + 动词原形。

2.当对现在及将来正在发生的动作进行推测时，一般用can / could, may / might, must + be + doing（动词的进行时）。

表示对过去状态、动作的推测

1.当表示对过去的状态、动作推测时, must / may / might可用在肯定句中表示肯定的推测，一般用must / may / might + have done（现在完成时）表示。

2. can / could用在否定句中表示否定的推测，一般用can / could + not + have done（现在完成时）表示对过去的状态、动作的推测。此外，can / could还可用在疑问句中表示推测。

4a

       Ask Ss to complete each sentence using the words in brackets.

Answers: 1. might be  2. must be  3. could be  4. can’t be  5. could be / must be

4b

       Ask Ss to read the conversations and complete each sentence.

Answers: 1. getting colder / cold outside  2. having a sore throat / ill  3. must be delicious  4. be that boring

4c

        Working in pairs, get Ss to share their ideas about the picture. What do they both agree on and why? What do they disagree on and why?

(Tip: There are no right or wrong answers for this activity as much depends on how each S justifies what he / she sees with the inference he / she makes.)

Optional choice:

       Show Ss more pictures of different bedrooms, ask them to tell about the person in each room.

Step 3 Summary & Homework

Summary

       Ask Ss to do the exercises from PPT P19-20.

Homework

       Preview Section B 1a-1e.

       Do the exercises in students’ book.

Teaching Reflection

We always get the students to learn grammar by summing up the sentences they have learned. Students can practice grammar by using. After they know how to use these modal verbs to make inferences, the students should practice in different activities. And we give them some written work after speaking and reading.