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is believed to have done
it
is
believed
to
da和to
have
don的区别
答:
It is believed to do sth 表示动作还未发生(可以理解为将来时)It
is believed to have done
表示动作已经发生(可以理解为完成时)
be+
believed
+
to
+
have
+
done
+结构中不定式做什么成分?
答:
在这个结构中,动词不定式作主语补语。动词不定式的完成式,表示的动作发生在谓语动词表示的动作之前,在句中可以作主语、表语、宾语、定语或状语,也可以作主语补语或宾语补语。这里动词不定式作主语补语,表示的动作发生在谓语动词表示的动作之前。
sb be
believed
to
do/ to be doing/ to
have
done
书
答:
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 将要去伦敦。(没去)Lucy is believed to going to London. Lucy被认为 正在去伦敦的路上。(在去的路...
Loulan
is
believed
___ over by sandstorms gradually from AD2...
答:
sb/sth
is
reported /
believed
to
do/to
have
done
,可以转化成It is reported /believed that句型,解答这类题目,关键是理解题干意思从而判断是动词不定式的什么形式,根据意思放入句子中进行比较,不难选出正确答案。
...
believed
to
have
been与
is
believed to have been的区别是什么...
答:
"
Has
been
believed
to
have
been" 和 "
is
believed to have been" 都是被动语态,但它们在时态上有所不同:1. "Has been believed to have been":这是现在完成时的被动语态,强调的是在过去某个不确定的时间点发生的动作对现在产生的影响或结果。例如:"He
has
been believed to have been ...
...been与
have
/
has
been
believed
to
have
done
的区别是什么_百度知 ...
答:
1. 不定式
to
have
been 用“完成式”是正确的,表示在谓语动词之前发生。2.
has
been
believed
是被动语态,意思是“被认为”。现在完成时表示这个看法是过去发生的,后面不定式的动作是“已经被人们认定”已发生了。has been believed 的意思是“已经被认定”。C.
is
believed to have been 现在被...
有关于英语语法1
答:
sb/sth be
believed
to
be doing 表正在进行(to be doing 与谓语believed同时发生)除了believed,这样的动词还有reported,considered,known,thought,said,found...解析:根据句意,大量艺术品被偷这件事情发生在believed之前,因此应该用to
have
done
,考虑到艺术品是被偷,而不是主动去偷,将主动态...
高二英语单选难题求助
答:
1. 答案:B.2. 解释:1)此题考查
believe
的固定结构。believe sb/sth (
to
be) + 名词/形容词 “认为某人/物是...”2) 但是如果“to be (to be) + 名词/形容词”所表示的事实发生在believe之前的话,则改用:believe sb/sth to
have
done
sth.此时,to have done sth中的to have done...
.../reported/
believed
/thought/known/ considered
to
have
done
...
答:
have
done
的形式是动词不定式的完成式, 谓语动词
had
done 表示过去完成时,非谓语动词不定式就三种时态,
to
do / to
be
doing / to have done to have done 表示die 的动作发生在谓语动词report 之前的动作。He
is
said to have gone abroad .He seemed to have finished the task ....
be said/ was/
believed
/ believed/ believed/ thought/ known+ t...
答:
解析:动词不定式的完成式表示过去发生的动作,即study动作发生say之前,从后面studied所用过去时态可知这一事早已发生。所以须用
to
have
done
形式。表明:"据说罗伯特过去曾经在某个国家学习过,但我不知道是在哪个国家"。答案为A。In fact, the London Stock Exchange
is
believed
to have started from ...
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