做非谓语动词考题的常用技巧
有些考题尽管选项用了非谓语动词作干扰,但命题者其实不是考查非谓语动词。这其中真正的考点通常有两种可能:一是考查祈使句,二是考查某些特殊句式。如:
例1 ______ at the door before you enter my room, please. (北京卷)
A. Knock B. Knocking C. Knocked D. To knock
解析:答案为A。此题从四个选项来看,好像是在考查非谓语动词,但实际上,本题考查的是祈使句的用法,即该句的主句是一个祈使句,句子后半部分是一个由 before 引导的时间状语从句。又如:Before you send the letter, check with Bill to see if the address is right. 你在寄信之前找比尔核对一下,看地址对不对。
例2 I think Tom, as the head of a big department, should either study regularly or ______ his job. (浙江卷)
A. quits B. to quit C. quitting D. quit
解析:答案为D。根据 either…or…的搭配特点,空格处应填一个与study 形式相同的动词,也就是用动词原形,故答案为 D。又如:You can either come by bus or take a taxi. 你可乘公共汽车来或是坐的士来。
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