情态动词和虚拟语气也是高考英语非常重要的一个语法项目。毋庸置疑,熟练掌握其用法对于语篇的准确理解大有裨益。另外,在书面表达中恰当地运用情态动词和虚拟语气,则会使文章语言地道,在彰显考生丰厚英语功底的同时,成为吸引阅卷教师的有力法宝。
命题趋势:在高考试卷中偶尔会出现在语法填空和短文改错中,常考查情态动词的基本用法;“情态动词+have done”结构中have done, 或是虚拟语气的基本用法。
考点一 can,could与be able to的用法
①The police still haven't found the lost child,but they're doing all they can.
警察还没有找到那个丢失的孩子,但是他们正在竭尽全力地寻找。(现在的能力)
②If you have a good sleep,you will be able to solve this problem.(将来的能力)
如果你好好睡一觉,你将能够解决这个问题。
③The fire spread through the hotel very quickly but everyone was able to get out.(过去有能力做并且成功地做了某事)
尽管这场大火迅速蔓延到了整个宾馆,但是每个人都逃了出去。
④I could have worked out the problem,but I was too nervous.(本来有能力做但未做)
我本来可以解决这个问题,但我太紧张了。
⑤How could you do such a silly thing?(表示惊讶)
你怎么能做这样的蠢事呢?
⑥Can I have a word with you?It won't take long.(表示请求)
我可以和你谈谈吗?不会花很长时间的。