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請(qǐng)看例句：

He has finished writing his novel. 他已寫完了他的小說(shuō)。

He had finished writing his novel by the end of last year. 去年年底他就寫完他的小說(shuō)。

He will have finished writing his novel by the end of next year. 到明年年底他就會(huì)寫完他的小說(shuō)了。

與一般現(xiàn)在時(shí)代替一般將來(lái)時(shí)一樣，在表示時(shí)間或者條件的狀語(yǔ)從句，通常要用現(xiàn)在完成時(shí)來(lái)表示將來(lái)完成時(shí)，而不能直接使用將來(lái)完成時(shí)：

I will go with you when I have finished my work. 等我完成工作之后我就同你去。

若不強(qiáng)調(diào)動(dòng)作的完成(且不至于引起歧義)，有時(shí)也可用一般現(xiàn)在時(shí)：

I will go with you when I finish my work. 我完成工作后就同你去。

四、將來(lái)完成通常搭配的狀語(yǔ)

1. 用作狀語(yǔ)的介詞短語(yǔ)

There will have been a definite result before Friday. 星期五以前將肯定會(huì)有結(jié)果。

By next Christmas we’ll have been here for eight years. 到下一個(gè)圣誕節(jié)，我們?cè)谶@兒就住了整8年了。

By now you will have guessed that I’m back in Ireland. 你現(xiàn)在應(yīng)該已經(jīng)猜出我回到了愛(ài)爾蘭了。

By the end of next week, I will have been a teacher for 25 years. 到下周末，我當(dāng)老師就有25年了。

We’d better wait till 14 December. David will have had his exam by then, so he’ll be able to enjoy himself. 我們最好還是等到12月14日。到那時(shí)大衛(wèi)就考完試了，這樣他就能夠玩得痛快。

2. 用作狀語(yǔ)的從句

If I don’t run, the train will have left.(www.52ysedu.com) 如果我不跑，火車就會(huì)開走了。

If he turns it down, he will have lost the moral high ground to the president. 如果他拒絕的話，就會(huì)把精神上的優(yōu)勢(shì)輸給總裁。

If you finish this job as well, you will have done far more than I expected. 假如你將這項(xiàng)工作干完的話，那你會(huì)干得比我預(yù)料的要多了。

If there was any scandal in that company, you can be sure that Bobby will have clocked it.  那家公司有任何丑聞，博比肯定會(huì)知道。