内容正文:
Part Three 语法必备
一、动词的时态、语态和主谓一致
[经典考题]
1.Of the nineteen recognized polar bear subpopulations, three are declining, six ________ (be) stable, one is increasing, and nine lack enough data.
2.I love coming here and seeing my family and all the friends I ________ (make) over the years.
3.On the last day of our weeklong stay,we ________ (invite) to attend a private concert on a beautiful farm on the North Shore under the stars.
4.I________(hope) to send Peter a gift to congratulate him on his marriage, but I couldn't manage it.
5.Diets have changed in China—and so too has its top crop. Since 2011, the country ________ (grow) more corn than rice.
6.This included digging up the road,________(lay) the track and then building a strong roof over the top.
7.She is determined to carry on with her ________(educate).
8.They are required________(process) the food that we eat to recover from injury and for several other bodily functions.
9.Sarah says,“My dad thinks I should take the offer now.But at the moment,school ________(come) first.I don't want to get too absorbed in modeling.”
10.Leaving the less important things until tomorrow ________ (be) often acceptable.
11.Truly elegant chopsticks might________(make) of gold and silver with Chinese characters.
[考点点拨]
(一)常考各种时态的用法
1.一般现在时
(1)表示经常发生的、习惯性的动作,通常用usually,often,always,sometimes,every day,once a week等作时间状语。
(2)表示客观真理、格言以及不受时间限制的客观存在。
(3)表示按时间表、计划、规定发生的动作。
(4)如主句用一般将来时,那么在时间、条件、让步状语从句中用一般现在时代替将来时。
2.现在进行时
(1)表示说话时正在进行的动作或存在的状态。
(2)表示现阶段正在进行的动作或发生的事情。
(3)表示位置转移的动词,如come,go,start,open,close,arrive,return,begin,leave,可用现在进行时表示按计划、安排即将发生的动作。
3.现在完成时
(1)表示过去发生的动作或状态刚刚完成或结束,对现在仍有影响,常用recently,lately,ever,never,already,before,yet,just等作时间状语。
(2)表示开始于过去某一时刻,一直持续到现在而且还有可能继续下去的动作或状态,常用so far,up till now,since+时间点,for+时间段,in the past/last few years,these days等作时间状语。
4.现在完成进行时
(1)表示开始于过去某个时间、一直持续到现在而且会继续进行下去的动作。
(2)表示到目前为止的一段时间里一直反复进行的动作。
5.一般过去时
(1)表示在过去某个时间发生的动作或存在的状态,常用yesterday,last year,in 1995,the other day等作时间状语。
(2)在时间、条