早教吧作业答案频道 -->英语-->
Makesureyourwindowsareclosedandlockedbeforeyougotobedatnight.这一句话能不能改成Makesureyourwindowshavebeenclosedandlockedbeforeyougotobedatnight.或makesureyourwindowshavebeenclosedandbeenlockedbeforey
题目详情
Make sure your windows are closed and locked before you go to bed at night.
这一句话能不能改成
Make sure your windows have been closed and locked before you go to bed at night.
或
make sure your windows have been closed and been locked before you go to bed at night.
这一句话能不能改成
Make sure your windows have been closed and locked before you go to bed at night.
或
make sure your windows have been closed and been locked before you go to bed at night.
▼优质解答
答案和解析
你仔细想想,这句话又没有必要改成累赘的完成时态.
虽然语法没有错,可以改,两种都对,但不简洁,没必要.
are closed是一种状态.
have been closed是一种动作完结.
强调重点不一样.
虽然语法没有错,可以改,两种都对,但不简洁,没必要.
are closed是一种状态.
have been closed是一种动作完结.
强调重点不一样.
看了Makesureyourwin...的网友还看了以下:
关于sp2sp3杂化的问题(一)比如NO2-分子中心N应该是6电子采取sp2杂化那应该是(1)N给每 2020-03-30 …
将字母组成单词,并译成汉语1.m,e,r,m,u,s,汉语2.u,l,t,e,c,u,r,汉语3. 2020-06-04 …
谁帮我做下下面的关于时间复杂度的习题?f(n)=100n^3+n^2+1000,g(n)=25n^ 2020-06-12 …
一个n脚输入的或门是否能被n-1个二脚输入的或门替代,为什么?顺便问个布尔代数化简M.R.P+Q. 2020-06-20 …
下列词语中加点字读音完全正确的一组()A.温蠖huò惨怛dá皋陶gāotáo东渐于海jiànB.皭 2020-07-10 …
求给以下算法复杂度排序增长速度由慢到快1)O(n^(3/4))O(log(n)^5)O(2^n)O 2020-07-23 …
一个有关大O(阶)的问题求两个单调递增函数f(n)和g(n)(n为自然数),f(n)≠O(g(n) 2020-07-31 …
设f(N)、g(N)是定义在正数集上的正函数.如果存在正的常数C和自然数N0,使得当N≥N0时有f 2020-07-31 …
我们规定:若点O是线段MN4中点,则称点M关于O4对称点是N(或称点M与点N关于O成中心对称);若 2020-08-01 …
氮元素可形成多种离子,如N3-、N3-、NH2-、NH4+、N2H5+、N2H62+等.(1)与N相 2020-11-24 …