過去將來時的五種表達形式.doc

過去將來時的五種表達形式一、was/were going to + 動詞原形He said that he was going to live in the country when he retired.他說他退休后要住在農(nóng)村。二、was/were + 動詞-ing形式Nobody knew whether the guests were coming.沒人知道客人們是否要來。三、was/were + 動詞不定式.It was reported that another bridge was to be built across the Yangtse River.據(jù)報道長江上將要再建一座大橋。注意：was/were going to + 動詞原形或was/were +動詞不定式完成式可表示未能實現(xiàn)的過去將來時間的動作。Last Sunday we were going to visit the Great Wall, but it rained.上星期天我們本想去游覽長城的，但卻下雨了。（沒有去成）I was to have helped with the performance, but I got flu the day before.我是打算幫忙演出的，但前天我感冒了。（沒有幫上忙） 四、was/were about to dowas/were about to do表示說話的瞬間就會發(fā)生的動作。I felt something terrible was about to happen.我覺得有可怕的事要發(fā)生了。五、was/were on the point of doingIm glad you have come. I was on the point of calling you, but youve saved me the trouble now.很高興你來了。我正準備給你打電話，現(xiàn)在你省去我這個麻煩了。提示：be about to do 和 be on the point of doing結構一般不與表示將來的時間狀語連用，但后面可以接when引導的分句。I was about to start when it suddenly began to rain. 我正要動身天突然下雨了六、特定場合的一般過去時可表示過去將來時條件狀語從句和時間狀語從句中須用一般過去時代替過去將來時。例1：I didnt know when she would come, but when she came I would let you know.例2：I didnt know if she would come, but if she came I would let you know.3) 在含有be about to do的句子中，不能再加時間狀語。如：Wrong: The medical team is about to start immediately. Right: The medical team is about to start. 醫(yī)療隊就要出發(fā)了。七）be to do: (1)表示事先商定、安排或準備要做的事情。如：The students are to meet at the school gate tomorrow. 2）表示可能性，必要、責任、義務、禁止等。如：Her necklace was not to(couldnt)be found. 她的項鏈找不到了。2) be going to do: 1) 表示將要發(fā)生的事情或打算最近要進行的動作。如：It is going to rain soon. 快要下雨了。2) 在含有條件狀語從句的主從復合句中，主句一般不用be going to，而常用will（第一人稱用shall）。如：The football match will be put off if it rains tomorrow. 3) be about to do: 1) 表示即將發(fā)生的動作，在時間上指最近的將來。如：We are about to start. 我們就要出發(fā)了。2) 在含有be about to do的句子中，不能再加時間狀語。如：Wrong: The me