1.When he got off the bus,it happened to be raining.

1.When he got off the bus,it happened to be raining.
为什么to 后面要加be 英语中的be 和being用在什么地方?
2.It's cold here.Would you mind closing the windows?
Would you mind not smoking?
mind去掉可以吗?我觉得去掉这里句子也通呢.
3.动名词的完成式由havinng+过去分词构成.表示动作发生在谓语动词所表示的动作之前.如：
He doesn't remember having ever promised me that.
She regretted having missed the film.
动名词的被动式由being+过去分词构成.如：
I remember being taken to Beijing when I was a child.
He came in without being asked.
什么情况下要用到动名词的完成式和被动式呢?我总想不通它用在什么地方?麻烦高手给我理清一 下,本人实在有点混了这些语法.
4.Although 和 though有什么区别?
5.It is no use ___anything with Thomas because he will never change his mind.
A.to discuss
B.being discussed
C.discussing
D.to be disscussed
选C..为什么呢?

1.现在进行时,表示他下车那会儿正在下雨.不用也可以,就是When he got off the bus,it happened to rain 表示他下车那会儿就下起雨来.
2.不能.去掉句子少谓语动词.
3.动名词的完成式：表示动作发生在谓语动词所表示的动作之前
这句话你不懂吗.例如He doesn't remember having ever promised me that.
promised这个动作发生在remember之前,就用动名词的完成式
动名词的被动式：表示动作的主体是被动的
He came in without being asked. 他没被问话就进来了.
He came in without asking people.他没问别人就进来了.
前者是时态,后者是语态,照理很好分啊
4.①although和though同义,在一般情况下,可以互换使用.只是though较普遍,常用于非正式的口语或书面语中,而although则较为正式.另外although语气比though重,常用以强调让步概念.
e.g. Though/Although my car is very old, I don't want to buy a new one.
虽然我的汽车很旧,但我不想买一辆新的.
He insisted on doing it although I warned him not to.
虽然我警告他不要做,但他仍然坚持要做.
②even能和though组合表示强调,但even不能和although组合.因此,不能说even although,在这里even though=even if(no matter if; though即使……也……)
e.g. Even if/Even though we could afford it, we wouldn't go abroad for our vocation.
即使我们付得起这笔钱,也不出国度假.
③当让步状语从句指某种假设情况时,通常用though,而不用although.
e.g. Though all the world were against me, I should still hold to my opinion.
就算全世界都反对我,我还是坚持我的立场.
Though everybody deserts you, I will not.
即使所有人都抛弃你,我也不会的.
④though可以独立用作副词,常放在句末,意为all the same (还是；仍然)或however(可是；然而),而although无此用法.
e.g. She didn't tell me what she had done, but I know it though.
她没有告诉我她所做的事情,但我还是知道了.
It's hard work. I enjoy it, though.
工作很苦,可是我喜欢.
⑤though引导让步状语从句时可以倒装,而although从句则不能.
e.g. Bravely though they fought, they had no chance of winning.
虽然他们打得很勇敢,但还是没有机会获胜.
相同点：①在although和though引导的让步状语从句中,主句里不可用but,若要强调前后两部分的对比意义,可在主句前加yet或still.
e.g. Although/Though he has a lot of money, yet/still he is unhappy.
他虽然有很多钱,但并不幸福.
②although和though引导让步状语从句时,常采用省略形式.
e.g. Although tired (=Although he was tired), he kept on working.
虽然很疲劳,但他继续工作.
The problem, though complicated(=though it is complicated), can be solved without much difficulty.
这个问题虽然复杂,但解决起来不会有很大困难.
5.记住固定句式It is no use doing sth