現(xiàn)在進行時

結(jié)構(gòu)：am/is/are+ doing

用法：

1. 現(xiàn)在( 指說話人說話時) 正在發(fā)生的事情。

 We are waiting for you.

2.當前一段時間內(nèi)正在進行的動作，說話時動作未必正在進行。

 Mr. Green is writing another novel.

(說話時并未在寫，只處于寫作的狀態(tài)。)

3. 表示顏色、溫度、年齡等正在漸變，說話的瞬間變化不一定明顯，動詞有g(shù)et, grow, become, turn, run, go, begin等。

 The leaves are turning red.

 It''s getting warmer and warmer.

4. 與always, constantly, forever 等詞連用，表示反復(fù)發(fā)生的動作或習(xí)慣性的動作，常表示不滿、抱怨或贊賞等情感。

 You are always changing your mind.（含不滿之意）

She is always helping others.(含贊賞之意)

5.進行時表將來時，常見的動詞有come, go, leave, arrive, return, die, stay等。

The train is arriving soon.

My sister is returning at two this afternoon.

不用進行時的動詞

1) 事實狀態(tài)的動詞

have（有）, belong, possess, cost, owe, exist, include, contain, matter, weigh(重達…), measure(尺寸是…), continue

I have two brothers.

This house belongs to my sister.

2) 心理狀態(tài)的動詞

know, realize, think, see, believe, suppose, imagine, agree, recognize, remember, want, need, forget, prefer, mean, understand, love, hate

I need your help.

He loves her very much.

3 ) 瞬間動詞

accept, receive, complete, finish, give, allow, decide, refuse.

I accept your advice.

4) 系動詞

seem, remain, lie, smell, feel, taste, get, become

You seem a little tired.

1.和被動語態(tài)放在一起考查；2.現(xiàn)在進行時表一般將來；3.現(xiàn)在進行時表抱怨、批評、贊揚的用法。

1. 現(xiàn)在進行表一般將來的動詞不熟悉；2. 被動語態(tài)的現(xiàn)在進行時出錯；3.辨別不出是在表抱怨、贊揚等，因此不敢用現(xiàn)在進行。                                               

【典型例題】

1. Although the causes of cancer____ , we do not yet have any practical way to prevent it.

A. are being uncovered B. have been uncovering

C. are uncovering D. have uncovered

解析：因被動語態(tài)的現(xiàn)在進行時不熟悉而錯選D。應(yīng)該是“盡管癌癥病因的面紗正在被揭開，但我們還是沒有什么切實的方法來預(yù)防它?！闭_答案A。

2.Ladies and gentlemen, please fasten your seat belts, the plane ____.

A. takes off B. is taking off C. has taken off D. took off

解析：錯選A。本題是現(xiàn)在進行表一般將來，“先生們，女士們，請系好安全帶，飛機要起飛了?！闭_答案B。

3. You ____ television. Why not do something more active?

A. always watches  B. are always watching

C. have always watched D. have always been watching

解析：錯選A。根據(jù)第二句話“為什么不做點積極點的事情呢？”可知，說話人有不滿的情緒。因此前面應(yīng)是“你老是看電視”。故正確答案B。