技巧七  强调动作发生在主句谓语动作之前时，原则上要用完成式（根据情况可用不定式的完成式或现在分词的完成式）

1. _____from other continents for millions of years, Australia has many plants and animals not found in any other country in the world. (2005湖北卷)

A. Being separated                                   B. Having separated      

C. Having been separated                         D. To be separated

【解析】答案选C。因为Australia与separate是被动关系，且separate发生在谓语动词has之前，所以用现在分词的完成被动式作原因状语(from www.nmet168.com)。

2. The manager, _____ it clear to us that he didn’t agree with us, left the meeting room. (2005江西卷)

A. who has made         B. having made    C. made                  D. making

【解析】答案选B。因为The manager与make是主动关系，且make发生在谓语left之前，所以用现在分词的完成式作状语，having made…相当于who had made…的意思。

技巧八  对于固定搭配，原则上按搭配习惯处理

1. ______ with so much trouble, we failed to complete the task on time. (2006四川卷)

A. Faced                    B. Face               C. Facing                 D. To face

【解析】答案选A。(be) faced with为固定搭配，其意为“面对”，又如：They are all faced with the same problem. 他们都面临同样的问题。

2. _____ in a white uniform, he looks more like a cook than a doctor. (2005湖南卷)

A. Dressed                B. To dress         C. Dressing               D. Having dressed

【解析】答案选A。(be) dressed in为固定搭配，其意为“穿着……”，句中的Dressed in…表原因，相当于As he is dressed in…的意思。

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