--- He looks so tired. What’s wrong?
--- Nothing serious. He just stayed up last night, ___________his papers.
A.to prepare
B.having prepared
C.prepared
D.preparing
答案:D
题目分析:整个句子已经有谓语动词,所以该空应该用非谓语动词,又因为He与prepare之间是主动关系或伴随状语,故排除C;选项A表目的或将来,但是前面不用加逗号,故排除A;选项B表示它的动作发生在谓语动词之前,显然是错误的,故排除A,所以选D
点评:非谓语动词是高考热点也是考生比较难以理解的语法项目,故考生需要做一些这方面的试题来加以巩固。
即学即练:_________attentively,he forgot the time for lunch.
A. to Read B. having read C. Read D. Reading
解析:D Reading attentively与he之间是主动关系,Reading attentively作原因状语。句意:由于在专心读书,他忘了吃午饭的时间。