现在进行时的基本用法:
1.表示说话时正在进行的动作
常和now,this week,at the moment,right now等时间状语连用,有时和动词如look,listen等连用,表示“现在”这一概念:
They are playing basketball now.
现在,他们正在打篮球。
Listen, She is singing an English song.
听,她正在唱英文歌。
2.表示现阶段正在进行着的动作
现阶段正在进行着的动作,不一定指说话时正在进行着的动作,而是某个大的范围时间。常和at present(目前),this week(本周),these days(这几天)等时间状语连用:
eg.We're looking for a house to rent for the summer.我们在找一栋房子想租一个夏天。
What courses are you studying this term? 你这学期学哪几门课?
3.表示当前的动向和状况
eg.People are getting less tolerant of smoking these days.如今人们对吸烟较为难以容忍了。
Houses are costing more these days.如今房价越来越贵了。
现在进行时的被动语态:
1、有些动词进行时的主动形式就可以表示被动的意思,常见的这些动词有: print, cook, fry, bake, burn, hang.
如:The house is burning. The meat is cooking.
2、在be + under / in/on +n. 的结构可以表示现在进行时的被动语态的含义。
The problem is under discussion now. = The problem is being discussed now.
3、与情态动词连用,表示对现在正在发生的被动行为的推测。
(1) John is not here .He must be being interviewed
(2) ---Do you know what Smith is doing?
---He is ill. He may be being examined by the doctor.
注意:助动词am/ is/ are和being缺一不可并且不可以颠倒顺序。
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