八大时态-经典系统的时态总结!

八大时态-经典系统的时态总结!内容摘要：

.（表示对比，都用进行时）。 常用在间接引语中。 was leaving early the next morning. asked him whether he was ing back for dinner. ： was/were+doing ： was/were + not + doing. ：把 was 或 were 放于句首。 ： At that time she was working in a PLA unit. When he came in, I was reading a newspaper. 五 .现在完成时。 常用的时间状语： already，get， never， just， before， recently， for+一段时间， since+一段时间 lately, in the past few years, etc. I have lost my key.（说明过去某时丢的，现在还未找到。 ） ，持续到现在的动作或状态。 I have known him for ten years. The dog has been dead for three days.。 We have been to the Summer Palace twice. 请你注意： 因为含有 for 加一段时间或 since 加一个时间点这样的时间状语的完成时，有动态和延续性的特点，所以不能使用终端动词或瞬间动词。 例： My sister has been here for 5 days.（过去分词做表语表示状态，可以延续） My sister came here 5 days ago.（终端动词） ： have/has + done ： have/has + not +d one. ： have 或 has。 ： I39。 ve written an article. It has been raining these days. 六 .过去完成时 1 以过去某个时间为标准，在此以前发生的动作或行为，或在过去某动作之前完成的行为，即 “过去的过去 ”。 常用的时间状语： before, by the end of last year(term, month…) ,由 by， before等词构成的表示时间的介词短语。 “过去的过去 ”这种逻辑关系常通过上下文体现出来，而不一定受某个时间状语的限制。 We had not heard from him by the end of last year. 态一致的原则，在从句中谓语动词要用过去完成时代替其他时态。 She said she had learned French for six ： had + done. ： had + not + done. ： had 放于句首。 ： As soon as we got to the station, the train had left. By the end of last month. We had reviewed four books 七、 一般将来时 ： ：表示将要发生的动作或存在的状态及打算、计划或准备做某事。 ： tomorrow, next day(week, month, year…),soon, in a few minutes, by。