必修4《Learning about Language》精品PPT课件优质课下载

必修4《Learning about Language》精品PPT课件优质课下载

(时间）.

(让步),

（方式）.

eg:

1)John often came to chat with me

2)As he is ill he didn't come to class yesterday.

3)She is sitting at the desk doing her homework

4)My father worked in this school ten years ago

5)Though he is young he knows a lot.

6)He came running

（程度）

（目的）.

（原因），

(地点)，

(地点)

3.动词-ing形式具有名词性质，可以在句中担任主语、宾语、表语、定语、补语和状语，但不能单独作谓语。4.在时态上，动词-ing形式有一般式（doing）和完成式（having done）两种形式。当动词-ing形式表示的动作1）发生的时间不明确；2）与谓语动词的动作同时发生； 3) 发生在谓语动词动作之后时，

eg:

a.I enjoy playing football.(playing 表示的时间概念不明确)

b.He has been used to going to bed late.(going to bed 与has been used to 同时发生)

c.I'm looking forward to seeing you soon.(seeing 发生在am looking forward to 之后)

}

用动词-ing形式的一般式（doing）

当动词-ing形式表示的动作发生在谓语动词动作之前时，常用动词-ing形式的完成式（having done）。

eg：

I'm sorry for not having hept my promise.(not having kept my promise 发生在am sorry 之前)