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have done before
Why couldn't you do that
before
,Why couldn't you
have
done
...
答:
1.意思不一样的 2.第一句意思是:你以前为什么不能做那件事 3.第二句话意思是:你以前本可以不做那件事(事实是你做了那件事)4.第一句是一般陈述 问题 第二句是虚拟语气,couldn't
have
done
是本可以不做 但事实上是做了那件事 对过去的虚拟 ...
have
/get/make sth.
done
这些是固定搭配么? 怎么用?
答:
是的 都是表示 使...被...
done
在这里过去分词表被动 i want to
have
my hair cut我想剪头发(使我的头发被剪)i'll get my homework done
before
8pm.我会在八点前写完作业的(作业被我完成)
have
been doing 和have
done
的区别
答:
I
have
read the book
before
. It
has
a very sad ending.(已经读完,知道故事结局)所以当我们想表达一个一直在进行的动作或经常重复的动作时,用have been doing。如果我们想表达某动作已经完成,并强调产生的结果或状态时,用have
done
。二者的差别在于动作是否完成以及表达的侧重点不同。弄清二者的...
before
的用法
答:
这里绝对不可以的。意思就完全错了,“如果你有准备,就肯定能容易地克服这些困难和问题。”换成
before
的话,“在你有准备之前,就肯定能容易地克服这些困难和问题”觉得这句话通顺吗,换成after可能还好一点的。
现在完成时中的
have
/
has
been+
done
什么意思?
答:
【现在完成时】的构成:助动词
have
/
has
+ 主动词的过去分词。主语为第三人称单数形式时,助动词用 has,其余人称用 have。We have seen that film
before
.(我们之前已经看过那部电影了。)解析:we 为第一人称复数,用助动词 have;主动词为 see,而 see 的过去分词是 seen,所以【已经看过...
Have
/
Has
been
done
与Have/Has done 到底有什么区别啊
答:
Have
/
Has
been
done
与Have/Has done 的区别只在语态使用的区别,如下:1、
have
been done是现在完成时的被动语态,表达的状态是一种被动的,一般主语用物。如:His homework
has
been finished
before
he went home.他的作业在回家之前就被完成了。2、have done是现在完成时的主动语态,表达的状态是...
had
+
done
与
have
+done有什么区别?
答:
She said that she
had
met him once
before
.I told them that I had
done
enough work for one day.I thought I had sent the check a week before.She wondered who had left the door open.B.与when, after, as soon as, by the time等连词连用。某些典型的连词常用在过去完成时之前,...
将来完成时的构成及用法是什么
答:
将来完成时的构成是由"shall/will +
have
+过去分词"构成的。将来完成时用来表示在将来某一时间以前已经完成或一直持续的动作。经常与
before
+将来时间或by+将来时间连用,也可与before或by the time引导的现在时的从句连用。They will have been married for 20 years by then.You will have reached ...
since和
before
的用法有什么区别呢
答:
假设过去某一时点为A,现在时点为B,则since表示从A到B的时间内,
before
表示A点之前 用法上since一般接
have
done
sth, before一般接 did sth 相应翻译为从A时点后,一直。。。和在A时点前,曾经。。。如I haven't seen him since Christmas. 与I saw him before Christmas 翻译:自从圣诞节后我...
"You and I We
have
met
before
"是什么意思
答:
You and I ,We
have
met
before
" 的意思是你和我以前相遇过。meet英 [mi:t] 美 [mit]vt.& vi.相遇;相识;开会;接触(某物)vt.满足;迎接;支付;经历(常指不愉快的事)n.运动会,体育比赛;猎狐运动(尤其英式英语)adj.适当的;合适的;恰当的 例句:We met by chance.我们是偶然相遇的...
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