高中英语语法 之 现在进行时讲解与练习
现在进行时是英语进行时态中的时态之一。其结构为助动词be 的现在表示形式（am, is, are） 现在分词。
1．表示说话时正在进行的动作。
e.g.We are having an English lesson now.
2．表示现阶段正在进行的动作，虽然此时此刻这动作不一定正在进行。
e.g.The workers are building a new factory.
3．少数动词go, come, leave, arrive, begin等的现在进行时，可以表示预计即将发生的动作。
e.g.The train is arriving soon.
4．表示反复发生的动作等。
常与always, constantly, continually等时间副词连用，表示反复发生的或习惯性的动作。这种用法的现在进行时常表示不满、抱怨或赞赏等情感。
e.g.John is always thinking of others.
5．表示一种委婉的语气。
hope, want, wonder等少数动词用于现在进行时，表示比用一般现在时更加委婉的语气。
e.g.I hope you can come and have supper with us.
注：①有些动词通常不可以用于进行时。这类动词通常是表示“感觉、感情、存在、从属、思维”等的动词。如：
表示感官的动词：see, smell, feel, look
表示感情的动词：hate, love, like, wish
表示存在状态的动词：be, exist, stay
表示占有与从属的动词：have, possess, belong
但如果词义改变，能表示一个正在进行的动作，就能用于进行时态。
e.g. He is looking for his pen.
② 非延续性动词一般不用于进行时。但如果要表示该动作的多次反复或表示一个渐进过程，也可以用进行时。
e.g. Fortunately people are beginning to realize just how serious the whole situation is.
跟踪练习
1. You ____ football after school. Why not go home and do your homework first?
A.always played B.have always played
C.are always playing D.have always been playing
2. I can’t understand why he ____ so selfish. He isn’t usually like that.
A.was B.had been C.is D.is being
3. As the job-hunting season is on the way, many graduates ____ from anxiety.
A.will be suffered B.are suffering C.wee suffering D.are being suffered
4. Jane is crazy about painting these days. She ____ in her studio all day long.
A.was staying B.stayed C.is staying D.will stay
5. You have no chance of getting the position. I’m afraid you ____ your time if you apply for it.
A.waste B.have wasted C.have been wasting D.are wasting
6. Selecting a mobile phone for personal use is not an easy task because technology ____.
A.is changing B.has changed C.will have changed D.will change
7. Professor Wang ____ in our school till next Sunday.
A.will have stayed B.has stayed C.is staying D.stayed
8. I ____ on a sofa because my grandparents have been here to spend the weekend.
A.slept B.was sleeping C.have slept D.am sleeping
9.If you ____ stealing in the supermarket, you’ll be sent to the police station immediately.
A.catch B. are catching C.will be caught D.are caught
10.I don’t really work here. I ____ until the new secretary arrives.
A.just help out B.have just helped out C.am just helping out D.will just help out
答案：CDBCD ACDBC
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