主页 > 英语语法 > 词类词性 > 连词用法 >

because、as、since、for的用法:because(因为)表示原因的语气最强,常表示必然的因果关系,从句一般放在主句后面;另外,回答why的问句只能用because. as(因为

because、as、since、for的用法:because(因为)表示原因的语气最强,常表示必然的因果关系,从句一般放在主句后面;另外,回答why的问句只能用because. as(因为)表示一般的因果关系,语气比because弱,说明比较明显的原因,它引导的从句可以放在句首也可以放在句尾。since(既然)表示对方已经知道、无需加以说明的原因或事实。for(因为)是并列连词,语气较弱,用来补充说明理由或提供一种解释。[1]用法,连词,相关知识点
in case用作连词的用法[1]case单词记忆法◆记忆方法一:分析:ca——“叉”的近似拼音; se——“蛇”的近似拼音 记忆方法:叉一条蛇放入盒子里◆记忆方法二:联想方式:ca-(查);se-(蛇)记忆方法:打开箱子,检查蛇毒。查看详情>>in case用作连词的用法in case用作连词时有以下两个用法:1. 表示条件,意为“如果”“万一”。如:In cas


because、as、since、for的用法:because(因为)表示原因的语气最强,常表示必然的因果关系,从句一般放在主句后面;另外,回答why的问句只能用because.  as(因为I will ring you up if he arrives on time.(如果他按时到达我会给你打电话的)

[注意]下列情况只能用whether不能用if:

1)导主语从句,[2]主语,从句,相关知识点
哪些从句作主语时可用it作形式主语It hasn’t been made clear when the conference is to take place. 会议什么时候召开还没有宣布。6. where从句It’s not known where she went. 她到哪里去了没人知道。It did not matter much where he lived. 他在哪里


2)引导表语从句,

3)从句作介词宾语,[3]从句,介词,相关知识点
介词except后面可接的六类从句[1]except单词记忆法◆记忆方法一:联想方式:ex(一些);ce(车);pt(普通)一些车很普通,被排除。◆记忆方法二:谐音:一颗涩葡萄 除了一颗涩葡萄之外都是甜的。◆记忆方法三:分析:ex --- 一休 ce——“厕”的拼音 pt——“葡萄”的拼音首字母; 记忆方法:除了一休之外,没有人喜欢在厕所里吃葡萄。◆


4)导不定式短语,

⑤引导让步状语从句,

⑥在动词discuss之后,

⑦在wonder / not sure之后,[4]wonder单词记忆法
◆记忆方法一:联想方式:音——忘得。记忆方法:使我惊讶的是,他对过去的事忘得一干二净。


8if与whether含义易混时。

如:Whether it is a fine day next Sunday is still a question.

(下个星期天是不是个好天还是个问题)(引导主语从句)[5]主语,从句,相关知识点
知识点1:从句作主语一定要按单数主语看待。[误] What he said are right [正] What he said is right [析] 从句作主语一定要按单数主语看待。 [正] The rich is not always happy 知识点2:从句主语时谓语用单数还是复数Whoever breaks this law deserves a fine.


Please ask him whether to go there with a raincoat or not.

(请问一下带不带雨衣去那儿)(作动词的宾语) [6]宾语,动词,相关知识点
动词express后接什么样的宾语[1]express单词记忆法◆记忆方法一:联想方式:ex(表示“特别、向外”前缀)+press(新闻)特别的新闻表达意见。◆记忆方法二:联想方式:ex(表示“特别、向外”前缀)+press(新闻)记忆方法:特别的新闻表达意见。◆记忆方法三:词根词缀记忆法:express v 表达;特快(ex把[思想]挤出来→表达),Press= press,


Hainan is the place to be, whether it’s summer or winter.[7]summer单词记忆法
◆记忆方法一:联想方式:summ-暑漫漫,er-热辣辣summer-暑漫漫,热辣辣的夏天真是令人难受。◆记忆方法二:分析:su——太阳(sun)的近似拼写; mm—美眉; r— 耳朵 记忆方法:夏天的太阳能把妹妹的耳朵晒黑。◆记忆方法三:联想方式:summ-暑漫漫,er-热辣辣记忆方法:summer-暑漫漫,热辣辣的夏天真是令人难受。

because相关单词意思与记忆法:

because单词意思解释释义:
conj. 因为相关词组: because of...

because单词记忆法:
◆记忆方法一:
联想方式:be(是)+ca(茶)+use(使用)
记忆方法:因为是茶的使用不当,所以才引起了腹泻。
since相关单词意思与记忆法:

since单词意思解释释义:
prep. 自...以后, 自...以来ad. 自那时以后conj. 既然, 自...以后, 自...以来相关词组: long since ever since

since单词记忆法:
◆记忆方法一:
联想方式:sin四年;ce车
自从来广州,他就开了四年车
◆记忆方法二:
联想方式:sin四年;ce车
记忆方法:自从来广州,他就开了四年车
because单词相关例句:

A wicked book is the wickeder because it cannot repent. 一本坏书危害无穷。
A  man who does not know what passion is will never know   love because love can come into being only when there is total self aban -donment .一个不懂得徼情的人永远不会懂得爱,因为只有在完全无我的时候,才有达到爱的境界。印度出生的宗教哲学家    克里希纳穆尔.J.
We thought, because we had power,we had wisdom. 我们曾这样想,因为我们有权力,我们就有智慧.
He is immortal  6, not because he alone among creatures has an inexhaustible 7voice, but because he has a soul, a spirit capable of compassion 8and sacrifice9 and endurance.  William Faulkner, American writer——我之不朽不是因为在动物中唯独地永远能发言,而是因为他有灵魂、有同情心、有牺牲和忍耐精神。   美国作家  福克纳  .W .
I believe that our Heaven Father invented man because he was dis-appointed in monkey——Mark Twain, American writer  我相信,我们的天父之所以创造人是因为猴子使他失望了。美国作家 马克·吐温  
Have no doubts because of trouble nor be thou discomtited; for the water of life's fountain springeth from a gloom bed.…
I've never any pity for conceited people, because I think they carry their comfort about
Mankind censure injustice, fearing that they may be the victims of it and not because they shrink from commintting it.——Plato, Ancint Grek philosopher人类对于不公正的行为加以指责,并非因为他们愿意做出这种行为,而是惟恐自己会成为这种行为的牺牲者。古希腊哲学家  柏拉图
Neither beliver nor reject anything, because any other person has rejected of believed it . Heaven has given you a mind for judging truth and error,. Use it.   Thomas Jefferson, American president   不要因为别的人相信或否定了什么东西,你也就去相信它或否定它。上帝赠予你一个用来判断真理和谬误的头脑。那你就去运用它吧/   美国总统  杰斐逊 .T.   
Knowledge is the most precious treasure of all things, because it can never be given away, nor stolen nor consumed. 知识是万物中最珍贵的财宝,丢不掉,偷不走,也不会损耗。
since单词相关例句:

I have long since abandoned the notion that higher education is essential to  either success or happiness. Hot houses of learning do not always grow anything edible.Robert Moses, American state govenment officer——我早已抛弃了这种观念:高等教育是通往成功或者幸福的必由之路。知识的“温室”并不总能生长可供食物用的粮食。美国州政府官员  摩西  R
The laws of Nature, that is to say the laws of God, plainly made every human being a law unto himself, we must steadfastly refuse to obey those laws, and we must as steadfastly stand by the conventions which ignore them , since the statutes furnish us peace, fairly good government and  stability, and therefore are better for us than the laws of God, which would soon  plunge us into confusion and disorder and anarchy if we should adopt them.Mark Twain, American  writer自然法即神灵法,只是用来约束每一个个体的法律,我们必须坚定地拒绝遵守。我们应该坚定地遵守忽视神灵法的规章制度,因为规章制度赋予我们和平、比较好的政府和稳定,因而对我们来说,规章制度比神灵法更好,因为如果我们采用神灵法的话,他会将我们陷入迷惑、无序和无政府状态。美国作家   马克·吐温A
Be not angry that you cannot make others as you wish them to be, since you cannot  make yourself as you wish to be.Thomas Mann, German writer——不要由于别人不能成为你所希望的人而愤怒,因为你自己也不能成为自己所希望的人。德国作家  托马斯·曼

The United States is a republic, since its citizens elect people to represent it.
美国是共和制,因为每个公民都能选人去代表他们。


I'm lame since my accident; I need the help of my arms to walk.
事故之后我就瘸了,我需要手来帮助我走路。


Primitive men made fire by themselves since they had no electricity.
原始人不能用电,只能自己生火。


Ever since she started her diet, she has had a very slim figure.
她的身材自从节食开始就很苗条了。


Great changes have taken place in China since the introduction of the reform and opening policy .
改革开放以来,中国发生了巨大的变化。


They greet each other out of manners, since they are just acquaintances.
他们招呼对方是出于礼貌,因为他们只是泛泛之交。


I like the white sheet since it looks clean.
我喜欢这个白床单,因为它看起来很干净。