内容正文:
备战2021年高考英语——时态之现在进行时(四)
1、定义:表示此时此刻某事正在被做.
例如:
The sport meeting is being held in our school.
我校正在举行运动会.
Another bridge is being built over the Yangtze River.
长江上正在修建另一座大桥.
2、构成:be + being+过去分词
A number of Dongfeng trucks are being shipped abroad.
一批东风卡车正被运往国外.
3、用法:
1)“be being done” 中的动词be应随主语作相应的变化.
2)将现在进行时的主动语态变为现在进行时的被动语态的关键是:把be doing变为be being done.
例1.The students are cleaning the classroom now.
→The classroom is being cleaned now.
现在学生们正在打扫教室.(are cleaning变为is being cleaned)
例2.The boy is counting some eggs.
→Some eggs are being counted.
那男孩正在数蛋.(is counting 变为 are being counted)
需要注意的用法有:
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。
4、现在进行时考查重点
一、考查现在进行时表目前这段时间正在进行的动作
考点说明:现在进行时可表目前这段时间正在进行,但此时此刻不在进行的动作。
1. Selecting a mobile phone for personal use is no easy task because technology _______ so rapidly.
A. is changingB. has changedC. will have changedD. will change
答案为A。认真分析语境可知,该句虽不强调科技此时此刻正在发展,但却强调现阶段正高速发展,因此应使用现在进行时。
2. Rainforests _______ and burned at such a speed that they will disappear from the earth in the near future.
A. cut B. are cut C. are being cut D. had been cut
答案为C。热带雨林之所以要消失,是因为现阶段正在被快速砍伐和烧毁,尽管此时此刻不一定有人在这样做,因此应用现在进行时的被动语态。
方法揭秘:认真分析语境,体会出动作此刻不在进行,但目前这段时间正在进行。
二、考查现在进行时表一贯性动作的用法
考点说明:现在进行时与always, constantly等副词连用时,可表反复性、一贯性动作,常用来表示赞扬或厌恶的感情色彩。
3. He_______ of how he can do more for the people.
A. had always thought B. is always thinking
C. has always been thoughtD. thinking always
解析:答案为B。由语境逻辑及always含义可知,该句表示他总是在考虑如何为人们多做点事,这是一个一贯性、反复性动作,带有强烈的赞扬色彩,因此应用现在进行时。
方法揭秘:寻找always,constantly等频度副词;认真分析语境是否表示一贯性动作;分析讲话者是否对该动作含有赞扬或厌恶的感情色彩。
三、考查现在