二．现在进行时：is / am / are + 现在分词
1．表示现在正在进行的动作。如
►. The kettle is boiling. Shall I make tea?
►. Don't you think you eat too much? You're putting on weight（体重增加）。
►. The workers are building a new bridge across the river.
2．表现阶段正进行的动作。
►. He is taking physics this semester（本学期）。
►. Weare preparing for our final examination this week.
3．go, come, leave, arrive, land, meet, die, start, return, join, etc. 用于进行时态时表示即将开始的动作。
►. Look! The bus is coming.看！车来了！
►. The old man is seriously ill, and he is dying.
►.
4．与 always, forever, continually, constantly 等副词连用，表示说话人带有感情色彩：赞赏或厌恶。
►. He is always thinking of others.（他总是想着别人。）[page]分页标题[/page]
►. The boy is continually making noises.（这男孩不断地发出吵闹声。）
►. The teacher is constantly (always) criticizing her for being late.（老师一直在批评她迟到。）
5．下面表示状态、感觉、情绪、精神活动的动词不可用于进行时。
（此条戒律请背 10遍！！！）
believe（相信），doubt（怀疑），see（看见），hear（听见） ，know（知道），understand （理解），belong（属于），think（认为），consider（认为），feel（觉得），look（看起来）， seem（看上去），show（显示），mind（介意），have（有），sound（听起来），taste（尝起来）， require（要求），possess（拥有），care（关心），like（喜欢），hate（讨厌），love（喜爱）， detest（憎恨），desire（意欲）
【简单记忆】：
● 永远不要说I'm believing...或He is seeing a house. 再简单一点说，这些动词后面不要随意加-ing.
● 可怕的是：我们在写作及口语中常犯此类大错！
● 注意：have a party / think about可以用进行时，因为这里have意为“举行”；think意为“考虑”。
测试精编：
1. How can you ________ If you are not ________ ?
A. listening / hearing B. hear / listening
C. be listening / heard D. be hearing / listening to
2.The girl even won't have her lunch before she ________ her homework. [page]分页标题[/page]
A. will finish B. is finishing
C. had finished D. finishes
3. Those who have applied for the post（职位）________ in the office.（此题超前）
A. are being interviewed B. are interviewing
C. interviewing D. to be interviewing
4. The old scientist ________ to do more for the country.
A. is wishing B. has been wishing
C. wishes D. has been wished
5. If he ________, don't wake him up.
A. still sleeps B. is still sleeping
C. still has been sleeping D. will be sleeping still
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