高考语法终极解析（七）——过去完成进行时与将来完成时(2)

You'll get to like the subject after you have studied it for some time. 在学习这个学科一段时间之后，你就会喜欢它的。 I'll go and see the exhibition as soon as I have finished my work. 我一做完作业就

　　You'll get to like the subject after you have studied it for some time.

　　在学习这个学科一段时间之后，你就会喜欢它的。

　　I'll go and see the exhibition as soon as I have finished my work.

　　我一做完作业就去看展览。

　　3. 将来完成时还可以表示可能性，或设想。例如：

　　It's five o'clock；they will have arrived home by now.

　　已经五点钟了，他们现在应该已经到家了。

　　（三）将来完成时与一般将来时的比较：

　　有具体的时间状语要用一般将来时。如：

　　Mr Smith will return home on the first Sunday next month. 史密斯先生将于下月的第一个星期日回家。

　　将来完成时的时间状语一般用介词by引入，如：

　　Mr Smith will have returned home by next month. 到下个月史密斯先生将已回到家了。

　　典例精析：

　　1. They ________ on the program for almost one week before I joined them, and now we ________ it as no good results have come out so far. (2005 江苏)

　　A. had been working; are still working B. had worked; were still working

　　C. have been working; have worked D. have worked; are still working

　　答案：A。

　　解析：不难看出第一空的动作发生在I joined them以前，且持续了一个周，应该用过去完成进行时；and now说明下面的动作仍在进行之中，应该用现在进行时。故选A。

　　2. Father ______ for London on business upon my arrival, so I didn't see him. (2005 福建)

　　A. has left B. left C. was leaving D. had left

　　答案：D。

　　解析：由I didn't see him可知父亲在我回来以前已经离开，动作发生在过去某个动作以前，故选用过去完成时。答案D。

　　3. The policeman's attention was suddenly caught by a small box which ______ placed under the Minister's car. (2005 广东)

　　A. has been B. had been C. was being D. would be

　　答案：B。

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