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hAD to BE DonE

C过去完成时被动态。

小题1:C小题2:B小题3:C小题4:D 文章讲述的是一种可以使病人感受不到疼痛的气体的使用,以及不同用量的后果小题1:事实细节题,根据第一段的Long ago, operation usually had to be done while the sick man could feel everything可知小题2:事实...

C.

你好; 选 B 过去分词作原因状语的用法。 这里的done 表示被动关系。 翻译:我工作完成了,我就回家了。 希望对您有帮助! 不清楚的请追问!

had just done表示刚做完.......紧接着就发生了........were/was doing.....when当......的时候在做.........be about to do when当........的时候准备要做............

be +动词不定式(即be + to do sth.)的用法如下: 1.表示按计划或安排要做的事。例如: When are you to leave for home?你什么时候回家? She is to be married next month.她将于下个月结婚。 The Queen is to visit Japan in a week’s time....

你好楼主, 这两个时态不一样,had been doing是过去完成进行时,就是相对过去的某个时刻来说已经对现在有直接影响并且还在进行的动作。 而have been doing是现在完成进行时,其表达的意思有两种:1.表示从过去某时开始一直持续到现在的动作,并...

If you want something you‘ve never had条件状语从句 其中 主语 you 谓语 want 宾语 something 定语(从句)you've never had you must be willing to do something you‘ve never done 主句 其中 主语 you 谓语must be willing to do 宾语 some...

2.It was used to be done by this way.3.It was used to be done in this way by Nancy.4.The snow had to be cleaned easily by them from the ...

had better be done ought to be done (1) am/is / are+及物动词的过去分词 ,体现一般现在时的被动语态 eg. English is spoken in their country. (2) was/were +及物动词的过去分词 ,体现一般过去时的被动语态 eg. Our school wasn’t built in ...

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