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问题 时态问题

It is estimated that 20%of the water flowing through today's distribution systems is lost to leaks. 冒昧的问一下老师主语从句中的is一般现在时可不可以替换为现在完成时。为什么要用一般现在时? 

文章 高中英语新教材-词汇教学参考资料-译林版-必修1-Unit 2

...   ▲roof▲battle                 ▲see eye to eye with sb (on sth)▲argument          ▲teenager▲tension              ▲anxious▲rate                     ▲shoot▲shoot up            ▲spot▲target                  ▲anger▲mental  ...

问题 for years与over the years前冠词的有无问题

years 可以构成两个词组:1. For years: I haven't been there for years. 2. Over the years: The carved ceilings have suffered woodworm attack over the years. 这两个词组意思差不多,都是“多年来”的意思,可是 for years 前是零冠词而 over the years ...

问题 to do/ to be doing/ doing 作定语时的区别

原句:There will be more than three hundred scientists attending the meeting...原句是还未发生的事情,为什么定语用attending,而不是to attend?  分词做定语相较不定式做定语区别是什么?如果用不定式,to attend 和to be attending 区别是什么?...

问题 dimension,aspect,respect当“方面”用法区别

...用哪个介词?是固定的吗?介词怎么选?2.“从各方面”in all respects,from every aspect是固定的吗?是固定的话为什么只能用all修饰respects不用every且前面只能用in不用from,为什么aspect只能被every修饰不能被all修饰且前面为什么只能...

问题 It is careless of sb to do sth句式的语法结构分析

It was careless of John to break up the cup.章振邦《新编英语语法》对这个句子的解释是,这里有两点值得注意:第一,不能把句中的 it与表示形式主语的 it 等量齐观,就是说,不能把 It was careless of John to break up the cup.这样的句子改为To ...

问题 speak ill of sb 的理解

专家请看此句:You should not speak ill of your friend.【你不应该说你朋友的坏话。】请帮我分析一下句子的结构,主要是 speak ill 怎么理解成“说坏话”?谢谢!

问题 that if...从句的结构分析

He sent yet another fax informing the journalist that if he did not reply soon he would be fired.本句出自新概念英语第三册,这句话的 soon he would be fired 是怎么和从句连接起来的?

问题 what引导宾语从句时作什么成分

The company has done precisely what it had long promised it would not. 请问what引导宾语从句,但是what作什么成分呢?只是引导词吗?  十分感谢!

问题 新概念英语第二册72课自己的3处疑问

...en and then answer the question. What mistake was made? The great racing driver, Sir Malcolm Campbell, was the first man to drive at over 300 miles per hour. He set up a new world record in September 1935 at Bonneville Salt Flats, Utah. Bluebird, the car he was driving, had been specially buil...

问题 用过去分词还是现在分词

In this “book of books,” artworks are selected and arranged in a way that emphasizes these connections between different eras and cultures. We see scenes of children learning to read at home or at school, with the book as a focus for relations between the generations. Adults are portrayed (描...

问题 作副词时down与downward有什么区别

... a lower level. 朝下地。例如:Benedict pointed downward again with his stick. 贝内迪克特又用他的拐杖向下指了指。ADV If an amount or rate moves downward, it decreases. 下降地 [ADV after v] 例如:Inflation is moving firmly downward. 通货膨胀在稳...

问题 be hard to do sth等结构中的不定式用主动式与被动式的比较

我看到了一个句子:The new relative party in our contract system took a while to be updated.我想问,可以用 to update吗?类似于下面的句子。I am hard to love.I have a lot of work to do.This is hard to believe.谢谢!

问题 as用法问题

He was kicked and punched as he lay on the ground.这里as是伴随状语嘛,各位老师们!

问题 When unirradiated state is at least 7 minutes of the onset of irradiation, at most 11 minutes.

老师们,这是一个时间状语,从句是主系表结构!学生想请问一下,这个句子该如何去理解?