题目

The speaker,,______for her splendid speeches,was warmly received by the audience.
A.having known B.being known C.knowing D.Known
对比
_______ the test paper,the student put down his pen with a smile on his face.
A Finishing B Finished C To finish D Having finished
分不清什么时候要加having，什么时候不要。

提问时间：2021-01-01

答案

1.having done sth 所表示的行为,先于谓语动词的行为.在你的第二个例句中,学生答完试卷(分词短语)在先,放下钢笔(谓语)在后.而在第一个例句中,演讲人的闻名(分词短语)与受欢迎(谓语),没有明显的先后差别.2.having don...