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问题 关于significant和obvious的区别

请问什么时候使用significant，什么时候使用obvious1. It is significant/obvious that he changed his will only days before his death.2. It's the first drug that seems to have a very significant/obvious effect on this disease.

问题 doing 还是to do

1.it is a waste of time/pleasure/fun/use/good doing2. there is no point /sense/harm/use/good doing sth以上两个结构中doing可以改为to do 么？有there is no hurry/need doing 的结构么，看到语法书里有这样的总结，有点乱。谢谢！

问题 反义疑问句的回答

1. There was nobody there when Mr Lee opened the door, was there?如果事实是“没有人”，改如何回答？（是No, there wasn't.吗？）2. He was unhappy to have a boy, was he?如果事实是“不高兴”，该如何回答？（是Yes, he was.吗？）3.以上两个问题的回答是...

问题 介词短语by...可以做同位语吗

He attempted to come across as America's “everyman” president in a very modern way — by working at McDonald's. 句子破折号后面的是同位语还是方式状语？怎么理解？

问题 语法长难句

句子："There is one and only one social responsibility of business," wrote Milton Friedman, a Nobel prize-winning economist, "That is, to use its resources and engage in activities designed to increase its profits."解析：1.only的词性2.没看懂书中的解释，从That is开始如何理解...

文章 关于at the age of...能否用作表语的讨论

关于at the age of...能否用作表语的讨论■倪肖丁（西安）【问】下面是1993年上海高考题的一道选择题：He looked quite healthy though he was ________.A. in seventy    B. in his seventy     C. at seventies    D. at the age of seventy公布的答案为D。但...

问题 will在间接引语中的时态

《英语常用词用法·详解大词典》席玉虎p2718的一个例句： He said he will be back in a few seconds. 他说他一会儿就回来。 句中的 will，我觉得应该用 would，不知我的想法对否，请专家指教，谢谢！

问题 长句中从句的识别与分析（包括翻译）

请问下面这个句子里的从句是什么从句？句子应如何翻译？谢谢！That is the way it is with a lot of things because everything's connected, for peace, we have to help others live in peace.

问题 表示多个民族时people可以用单数吗

Spain is a composite of diverse traditions and people. 西班牙是一个汇集了多种传统和民族的国家。这个句子中的 people 是表示“民族”，为什么不用复数呢？这里不是有 diverse（各种各样的）修饰吗？

问题 earth前面为什么不用定冠词

这个句子中的 earth 前面为什么没用定冠词？尤其这里是与 the moon 在对照着使用，也没有用定冠词，有点奇怪，求专家解解释：The moon is a satellite of earth. 月球是地球的卫星。

问题 有关虚拟语气的选择题(涉及without)

Without his help, I _______ the examination.A. cannot pass   B. would not   C. would not have passed   D. will not pass

问题 become 能跟“since + 一段时间”连用吗

become 是“非延续性动词”，一般不跟“for + 一段时间”连用。但它能否跟since 连用吗？例如：She has become a teacher since 1990. 自从1990年以来她就一直当老师。请问：这个句子对吗？为什么？

问题 情态动词(should, would, might)

I didn't send out my application form last week,but            .A.had B.would    C.should have    D.might have to请老师详细讲解这道题，谢谢老师啦!

问题 情态动词(shall, should等的用法)

Tom           better than to ask Dick for help.A.shall know B.shouldn't know C.has known D.should have known请老师详细讲解这道题，谢谢老师啦!

问题 为什么用setting 和 initiating

When Roosevelt became president，he transformed this love of the West into concrete legislation，setting aside lands for national parks，national forests，initiating a vigorous national debate about conservation.为什么用setting 和 initiating?