【正文】
The old man said he joined the Red Army in 1993. 3. 說話者強調(diào)動作正在進行或?qū)⒁l(fā)生。 He told me that he had been teaching physics for more than twenty years. The telephone had been ringing for three minutes before somebody adswered it. 十三、時態(tài)的呼應 ( the sequence of tenses) 規(guī)則:在主句謂語動詞表過去的復合句中,從句謂語動詞后退一步,即 ? 一般現(xiàn)在時 → 一般過去時 ? 一般過去時 → 過去完成時 ? 一般將來時 → 過去將來時 The experiment is going on now. I thought the experiment was going on now. 以下情況不遵守時態(tài)呼應規(guī)則: 。 I’ll have done all the work by the time you are back this evening. The birds will have moved to the south before winter sets in. 十一、現(xiàn)在完成進行時 ( present perfect continuous tense) 表示從過去某一時間開始一直延續(xù)到現(xiàn)在的動作,這個動作可能剛剛結(jié)束,也可能要繼續(xù)進行下去。 He has been ill for three days. He has paid his ine tax. I have not seen her since 1991. 九、過去完成時 ( past perfect tense) 表示過去