check 一个句子that must have been hard那一定很难受为什么不用that must be ha

来源：学生作业帮编辑：搜狗做题网作业帮分类：英语作业时间：2024/04/30 03:49:49

check 一个句子
that must have been hard
那一定很难受
为什么不用
that must be hard
那个人在诉苦
然后别人就对他说这句话..

如果只是表示对事情的单纯猜测,就可以用第二个,比如：
She ate an apple yesterday,it must be sweet.
她昨天吃了一个苹果,它一定挺甜的.
这里用的it而不是that,因为后来说的是苹果.
又如：
The homework took him 2 hours,that must be hard.
猜测作业很难.
但是问题是“那一定很难受”,这里是表示某个人因为某件事情感觉难受,而不是这件事情本身难受,所以说that must have been hard
多看英文文章自然就能体会

All that must be done ____(do).答案是have been done,为什么是这个答案?这句选词填空（can't have been\must be\must have been\can't be \may ha must have been done/must be done take a look at that car,it must have been expensive,为什么用have 英语翻译“那一定是某种蚊子咬了我.”that must be some mosquito bited me.中间有一个系 It's the frist time that I( )asleep then.A.must be B.must ha He must have been asleep at that time,(wasn't) he?为什么是用 wasn that girl must be Amy must be和must have been 在句子中作什么成份及其时态? 模仿例句改写句子.Example:He must be in the office.→He must have been requirenments that must be met=requirenments that must be___ A.must be B.may have been C.can have been D.could be ,为什么呢,