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sB BE BEliEvED to Do/ to BE Doing/to hAvE DonE ...

to do后面表示的是将来时态,代表某人被认为 将要做某事。 to be doing 表示的是现在时态,代表某人被认为 目前正在做某事。 to have done表示的过去时态,代表某人被认为 应经做过某事。 例 Lucy is believed to go to London. Lucy被认为 将要...

要去做。 正在做。 做过。

三者的主要区别为动作的完成状语不同: 1.to do强调去做,但还没做,例: I have something to do tomorrow. 明天我有些事情要去做. 2.to be doing 强调正在做,例: Everyone seems to be doing it. 每个人似乎都在这样做。 3.to have done强...

He seems to do ..他像是准备作某事 举例:He seems to watch TV. 他好像要去看电视。 He seems to have done..他好像已经做完某事 举例:He seems to have finished his homework. 他看起来已经做完家庭作业了。 He seems doing ...他像是正在...

提供几个实例,请注意括号内的时态,相信您会领悟到: 1、Someone says that she( works) as an actress. It is said that she works as an actress. She is said to work as an actress. 2、People say that he( has finished) wriiting a nove...

seem to be doing sth表示不定式的动作和主句中seem是同一个时态,比如,He seems to be doing his homework. 他好像正在做作业; seem to do 表示不定式的动作发生在主句动词seem之后,比如It seems to rain. 好像要下雨了。 rain的动作,是发...

都是动词不定式,但是to do是动词不定式的一般式;to be doing是动词不定式的进行式;to have done是动词不定式的完成时。 1,to do表示一般情况下要去干什么,时间可能是过去、现在、或是将来。是笼统的,不强调具体什么时间。例如: It all de...

没有第二种结构 Sb/ Sth is considered to ... (认为某人、某物。。。。) consider doing sth 考虑做什么 【希望帮助到你,若有疑问,可以追问~~~ 祝你学习进步,更上一层楼!(*^__^*)】

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