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have done before
however和nevertheless的区别?
答:
区别:1、however比but的词义还要弱些,并不直接引出相反的意见,因此常用作插入语。2、nevertheless的含义为即使做出完全的让步,也没有任何影响,或者说也不是决定因素。3、however 所指关系比较松弛 ,nevertheless所指关系比较紧凑。4、nevertheless表达的深度比however更深。5、nevertheless更有承接上文提到...
语法求救
答:
语法——现在完成时 1.构成:
have
/
has
+ v.过去分词(
done
)否定:have/has not+ v.过去分词+…疑问:
Have
/
Has
+ 主语+ v.过去分词+…2. 用法:⑴表示过去发生的某一动作对现在造成的影响和结果,常与already, just, yet, ever, never,
before
(句末)等连用.注意:当在肯定陈述句中含有already...
“
have
had
”是什么时态和句型?为什么要用两个have?
答:
“
have
had
”即“have
done
”表示现在完成时,had是have的过去分词形式,这里只不过刚好那个done又是have而已。例句中植物的基因到现在时刻已经得到了改变,基因得到改变这个动作已经到现在完成了,所以用现在完成时态。现在完成时的用法:主语+have(
has
)+过去分词(done)1、现在完成时用来表示现在之前已发生...
have
done
的相关用法
答:
have
been living here for ten years.2.
had
done
是过去完成时,表示过去的过去,指过去某一时间之前就已完成的动作。如:We had finished it by the time they went back.He told us that he had seen the film (two years
before
).Last night, he had not come back by 12 o'clock.
...对什么过去完成时非常不懂,是那些
have
done
之类的。
答:
比较的两题:1 考点:强调句结构It is\was...that,强调时间状语 2 years ago,元句子为)she went to teach in the mountains 2 years ago,and we
have
never seen her since then 2 考点
before
引导的时间状语从句,注意before在这里的;理解,before在引导时间状语从句是有四个重点句式:It was...
before
的用法和如何判断其时态
答:
它们的区别都在于系动词(be)和助动词(do和
have
)的时态变化。 先看完成的:(现在)完成:have
done
(过去)完成:
had
done (将来)完成:will have done 接着进行的:(现在)进行:be doing (过去)进行:was、were doing 然后看一般:一般现在时;分两种:be (am、is、are)和 do、does 最后是将来的:一般将来:be go...
however的区别是什么呢?
答:
however,whatever的区别:1、whatever用作强调的关系代词时,意思是“任何(事物),每样(事物)”,用于引导名词性从句。所引导的从句作主语时,谓语要用单数形式。2、whatever经常用于疑问句中,可加强语气,意思是“无论什么,不管什么”。3、whatever用作连接代词时,还可以用在让步状语从句中表示“无论...
英语什么时候用现在完成时,有没有特殊情况一定要用现在完成时的_百度...
答:
现在完成时:
have
/
has
done
过去完成时:
had
done 将来完成时:shall have done 过去将来完成时:would/could have done 现在进行时:is/am/are doing 过去进行时:was/were doing 将来进行时:will/shall be doing 过去将来进行时:would/could be doing 现在完成进行时:have/has been doing 过去完成进行...
...所为感到后悔的。因为关键因素在于你自己(
before
)
答:
Before
long, you will regret for their actions. Because the key factor is yourself
have
been和have
done
有什么区别?
答:
"
Have
done
" 表示已经完成的动作或动作的结果。它是现在完成时态和过去完成时态的形式之一。例如:- I
have
done my homework. (我已经做完作业了。)- She
had
done her research
before
the meeting. (开会前她已经做好了研究。)注意,"have done"强调的是一个动作的完成,不涉及时间范围的持续...
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