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问题 有些句子是否用现在完成时和一般将来时都可以

The WTO adds that that amount will have increased / will increase to 66 percent by 2025.语法书上说 by+将来的时间要用将来完成时，所以将来完成时是不是对的?是不是用将来时也可以?

问题 for better more than for worse所作的成分

Online dating has changed the search for a mate, for better more than for worse.请问for better more than for worse这是什么词？作什么成分？能修饰什么？

问题 as引导的让步状从的倒装形式

As much as we would like to cling on to our past,even the saddest moments can be wash away with time 本句中句首的第二个as引导的是让步状语从句，我也知道必须倒装，因此much提前，但是我不明白为什么又多了一个as ，直接much as引导不行吗？请问第一...

问题 decorated是过去分词做形容词吗

Having left the BAIDI city on a morning decorated by fancy clouds，I returned within one day to Jiangling a thousand miles away。（朝辞白帝彩云间，千里江陵一日还）第一句是状语从句吗，两个动词left是状语从句的谓语，decorated是过去分词...

问题 帮助我是他的责任。这三个句子对吗？为什么？

1.It is the duty to help me for him.2.It is his duty to help me.3.To help me is his duty.帮助我是他的责任。这三个句子对吗？为什么？

问题 某动词的名词和其动名词形式

Still the landlord gave him and his dog a lashing !问：此句中lash用了动名词形式，可是我查了下lash本来就有名词的形式，这里我想问一个动词即有动名词的形式又有其本身的名词形式，那在用到其名词形式时，我们优先选择其那一种名词...

问题 18-year-old（18岁的）可以省略连字符号吗

在一篇短文中看到这样一句：Mr Smith has an 18 year-old daughter, who is studying the piano at college.按我的记忆，这里的 18 year-old 应该是 18-year-old 吧！为什么省略了一个连字符呢？

问题 与on arrival（一到达）类似的表达

...做某事就”“刚做某事就”。如：On arriving home I discovered the burglary. 我一到家就发现家中被盗。2. 但“on + 名词”好像也有类似表达，比如 on arrival（一到达，刚到达）。如：So that I shouldn’t worry, he phoned me on arrival. 为了不让我担...

问题 作表语的不定式为什么不带to（主语没有do）

《新概念英语》 第四册最后一课有个句子:The golden rule here is spread your risk. 请问为什么 is 后没有 to? 谢谢。

问题 时间状语从句和if引导的真实条件句可以有哪些时态

时间状语从句和if引导的真实条件句可以有哪些时态？主句若是过去时，从句会不会有用到过去完成时表过去已完成。如：He told me to wait until the manager had come back.谢谢老师回答！

问题 whether…be…的用法对吗？（上海2012春季高考题）

下面的句子摘自2012上海市春季高考卷：All involved should try to be sensitive in listening to, understanding and dealing with special concerns or needs that arise whether they be from the student, parents or friends. 请问句中的 be 用得对吗？整个句子是什么意思？

问题 his hands crossed under his head分析

He was lying on the grass, his hands crossed under his head(=and his hands were crossed under his head).他躺在草地上，将两手交叉枕在脑后。不理解为什么是his hands crossed 呢？为什么是被动关系？不应该是主动关系his hands corssing...吗？

问题 to do还是to have done

... after doctors completed a 20-hour operation _______ one-year-old twins at the head.A. to separate B. to have separated  老师，您好。此题究竟选A还是选B，我一直困惑不解。有人说只可以选A，有人说必须是B。您的看法是什么呢？为什么？ 

问题 have sth done还是have done sth

Mrs.Brown was much disappointed to see the washing machine she had ______ went wrong again.答案是repaired，为什么不能用it repaired呢?我的想法是这台洗衣机不是Mrs.Brown自己修的，而是她请人修的，所以填了had it repaired。

问题 be good for doing 与 be good to do

This is because the juice from tomatoes is really good for making surfaces clean.请问句中的 for making 可以换成 to make 吗？