A. had been; have seen B. have been; have seen C. had been; had seen D. have been; had seen 8. This is Ted’s photo. We miss him a lot. He ___ trying to save a child in the earthquake. A. killed B. is killed C. was killed D. was killing 9. — How a...
12将来完成进行时(will have been doing) 表示动作从某一时间开始一直延续到将来某一时间,是否继续下去,应视上下文而定。 例:By the end of next month, the project will have been being worked for 3 years. 到下个月底为止,这项工程就已经不停地进行了3年了。 13...
现在完成进行时(have/has been doing) 表示某一动作开始于过去某一时间,延续或重复地出现至今,或将继续延续至将来。 例:We have been working on this project for over a month now. 到目前为止,我们一直在处理那个项目,已经花了一个多月时间了。
1.Striped awnings had been stretched across the courtyard. 一些条纹雨篷撑开架在院子上方。 2.He stretched his arms for a book. 他伸出手臂去拿一本书。 3.The forests stretch for hundreds of miles. 森林连绵数百英里。 4.You're stretching my patience to ...
b) 该做或不该做的事情(语气上接近于should, must, ought to, have to),表示一种命令、规劝性语气。 例:You are to go to bed and keep quiet, kids. Our guests are arriving in less ...
更多内容请点击：2017高考英语重点语法:高考英语常考语法总结——动词时态和语态