知识点总结
现在进行时
结构：am/is/are+ doing
用法：
1. 现在( 指说话人说话时) 正在发生的事情。
 We are waiting for you.
weigh的用法2.当前一段时间内正在进行的动作，说话时动作未必正在进行。
 Mr. Green is writing another novel.
(说话时并未在写，只处于写作的状态。)
3. 表示颜、温度、年龄等正在渐变，说话的瞬间变化不一定明显，动词有get, grow, become, turn, run, go, begin等。
 The leaves are turning red.
 It''s getting warmer and warmer.
4. 与always, constantly, forever 等词连用，表示反复发生的动作或习惯性的动作，常表示不满、抱怨或赞赏等情感。
 You are always changing your mind.（含不满之意）
She is always helping others.(含赞赏之意)
5.进行时表将来时，常见的动词有come, go, leave, arrive, return, die, stay等。
The train is arriving soon.
My sister is returning at two this afternoon.
不用进行时的动词
1) 事实状态的动词
have（有）, belong, possess, cost, owe, exist, include, contain, matter, weigh(重达…), measure(尺寸是…), continue
I have two brothers.
This house belongs to my sister.
2) 心理状态的动词
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 ) 瞬间动词
accept, receive, complete, finish, give, allow, decide, refuse.
I accept your advice.
4) 系动词
seem, remain, lie, smell, feel, taste, get, become
You seem a little tired.
常见考法
1.和被动语态放在一起考查；2.现在进行时表一般将来；3.现在进行时表抱怨、批评、赞扬的用法。
误区提醒
1. 现在进行表一般将来的动词不熟悉；2. 被动语态的现在进行时出错；3.辨别不出是在表抱怨、赞扬等，因此不敢用现在进行。                                               
【典型例题】
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：因被动语态的现在进行时不熟悉而错选D。应该是“尽管癌症病因的面纱正在被揭开，但我们还是没有什么切实的方法来预防它。”正确答案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：错选A。本题是现在进行表一般将来，“先生们，女士们，请系好安全带，飞机要起飞了。”正确答案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：错选A。根据第二句话“为什么不做点积极点的事情呢？”可知，说话人有不满的情绪。因此前面应是“你老是看电视”。故正确答案B。

版权声明：本站内容均来自互联网，仅供演示用，请勿用于商业和其他非法用途。如果侵犯了您的权益请与我们联系QQ:729038198，我们将在24小时内删除。