22. By the time                ，I will have finished reading  the book. (come)

到他回來(lái)時(shí)，我將讀完這本書(shū)了。

22. he comes back考查一般現(xiàn)在時(shí)表將來(lái)的用法。在主從復(fù)合句中，主句時(shí)態(tài)為將來(lái)時(shí)，從句時(shí)態(tài)應(yīng)用一般現(xiàn)在時(shí)表將來(lái)。在本句中，bythetime 引導(dǎo)的句子是從句，因此"回來(lái)"的時(shí)態(tài)應(yīng)是一般現(xiàn)在時(shí)表將來(lái)。

題目來(lái)源：高考丟分題英語(yǔ) > 專題訓(xùn)練 2：時(shí)態(tài)和語(yǔ)態(tài)

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