英语:Unit15 Learning学案(北师大版必修5)
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 Unit15 Leaning to Learn

【本讲教育信息】

一. 教学内容:

  unit15 lesson 1 (I)

  学会用英语简单描述个人学习英语的困难、方法

二 教学重点和难点:

1. 情态动词may, might的用法

2. 连词if, unless, once 的用法

3. 词汇和词组

三. 具体内容:

(一)情态动词may, might的用法

May 可以表示没有把握的推测,意思是"可能",但只能用于肯定句,might 表示推测时,不表示时态,只是可能性比may小。

May 还可以表允许或请求的意思,用might则语气更加委婉,客气。May 主要用于第一人称,而且要比用can正式的多。

 May I ask you a question?

 Might I use your eraser for a while?

 Yes, please.

  Yes, you may.

 No, you mustn't.

  No, you had better not.

  No, you can't.

(二)连词if, unless, once 的用法

e.g. If that is true, what should we do?

Give me a call once you arrive at the airport.

Once I finish my homework, I will call you.

I won't remember new vocabulary unless I hear them.

  从属连词:只能用来引导从句,不能引导词或词组。这些从属连词包括:that, when, till, after, before, since, if, because, though, although, so...that, so that..., as soon as, once...等。从属连词一般可以引导名词性从句和状语从句。

 1. 引导名词性从句的从属连词:

  (1)that

  He said (that) he would come.

  That she is still alive is true.

  (2)if 是否

  I wonder if he is at home.

  (3)whether是否

  I asked him whether he would come.

 2. 引导状语从句的从属连词:

(1)连接时间状语从句的从属连词: