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问题: 如何看英语中的省略成份?

We should do as much as we can ___ our country better and more beautiful.
A.make B.to make C.makes D.making
此题如何作答?据说can后省略了do,do指什么?如何看出来的?

请各位专家赐教。【附类似例题并详解者加分】

解答:

是的,该题情态动词后省略了do。实际上这个do事代替前面的谓语动词的。也就是说这个句子的完整形式是:We should do as much as we can (do much)_to make__ our country better and more beautiful.只是在这个句子里,恰巧用到了动词do。又比如说:She tries to save as much as she can (save the money) to help her son.
从这两个句子中,我们可以看到,情态动词can后,省略了与前面相同的谓语动词。而后面紧跟着的是要做这件事的目的,所以用动词不定式。
类似的句型还有:
sb. does all he/she can to do sth.
sb. does what he/she can to do sth.