外研版Book4Module6UnexplainedMysteriesoftheNaturalWorldPeriod6教案

Module 6　Unexplained Mysteries of the Natural World

Period 6

Teaching contents: Grammar: May/might have done.

Main and difficult teaching points: Grasp the usage of may/might and other modal verbs + have done.

Teaching procedures:

Step 1 Revision

  Revise the words and phrases in the previous period. 

Step 2 Grammar learning 

  1. Revise the usages of modal verbs, may and might, with the help of PPT briefly.

1) May表示请求、允许，比can较为正式。

  e.g. May I come in?    You may go now.

2) May表示说话人的猜测：“也许”，“可能”: 通常只用于肯定句和否定句中。

 e.g. –I believe the man is from England. –But I may be wrong.  

     The guest may arrive this afternoon.

3) May表示祝愿；但语气较正式。  

 e.g. May you succeed!

   might多在间接引语中表示过去的可能和允许，也可以用于表示表示现在的可能，其可能性要比may小，如要表示过去的可能可以用could。

  2. Task 1 Ss read through the grammar explanations on P71 and underline the main points.

3. The teacher gives a brief explanation of modal verbs + have done with the help of PPT.

1) may/might have done 对过去某事的可能性猜测“可能已经”

2) must have done 对过去某事的肯定猜测，“想必，一定，准是”

3) can/could have done 本来能做的事实际却未做到 (遗憾,惋惜)

4) can’t/couldn’t have done对过去某事的否定性猜测“想必不可能，一定不”

5) should/ought to have done 过去应该做而实际未做“本应该”，表责备，语气较强。

6) needn’t have done 本没必要做某事但做了某事

Step 3 Grammar exercises

1. Complete the grammar exercises on P57 in TB and then check the answers.

2. Complete the grammar exercises on P72 in RB and then check the answers.

Step 4 Summary

  Summary the grammar items learned in this period.

Homework:

 1. Complete all the grammar exercises in RB.

 2. Read the grammar explanations after class to consolidate the grammar items.