表示转折关系的连词，连词and的作用，引导时间状语从句的连词

知识点1:表示转折关系的连词

表示转折关系的连词：主要有but, only, while, when, whereas等。
如A great deal has been accomplished, but more remains to be done.
He is riding, while his father is walking in the dust.
Why did you borrow the book when you had one?
He is ill, whereas I am only a little tired.[1]a little,little,相关知识点

each， either 其后都要加单数名词，而 both 后要加复数名词。 如： each， either， another， little， a little， much等作主语时，谓语动词全部要用单数形式。［误］ Both side is full of trees ［正］ Both sides are full of trees ［析］ each， either 其查看详情>>

only表示意义转折，只见于非正式文体。如You may go, only come back early.(only = but)
温馨提示：1 有些词或短语在句中也表示转折意义，如still, yet, however, all the same, after all等。通常作连接性状语。
如The problem was a little hard, yet I was able to work it out[2]a little,little,相关知识点

知识点1:few、a few、little、a little的区别few C. little D. a little Answer[辩析]1. few 与 little作形容词用，都表示“几乎没有”，相当于一个否定词。具体区别：(1) few 后面跟复数可数名词。 e.g. few books fewstudents(2) little 后面跟单数不可数查看详情>>

I explained twice, still he couldn't understand.
2 while在表示转折关系时，往往连接内容和结构对称的句子。
如I love strong tea while my father loves coffee.[3]strong单词记忆法

◆记忆方法一：联想方式：st（身体）＋rong （茸）这个年轻人身体毛茸茸的，看起来非常强壮。◆记忆方法二：联想方式：st（身体）＋rong （茸）记忆方法：这个年轻人身体毛茸茸的，看起来非常强壮。查看详情>>

3 both … and … not结构和neither … nor …的区别在于前者表示部分否定，而后者表示全部否定。如Both you and I are not correct. Neither you nor I am right.

知识点2:表示选择关系的连词

表示选择关系的连词：主要有or, either … or, or else, whether … or, otherwise等。如Which do you like better, tea or coffee?
Either you leave this house or I’ll call the police.[4]police单词记忆法

◆记忆方法一：联想方式：police－破驴车警察驾驶破驴车。◆记忆方法二：分析：poli—发音接近―玻璃‖ ce—车的近似拼音 记忆方法：警察开着玻璃车在街上巡逻。◆记忆方法三： 分析：po— “婆” ； li—“梨”； ce— “车”的谐音； 记忆方法：警察拉走了婆婆卖梨的车。◆记忆方法四：联想方式：police－破驴车记忆方法：警察驾驶破驴车。查看详情>>

Do it at once, or else! = Do it at once, otherwise you will suffer in some way.
Take a taxi, otherwise you won’t get there in time.
表示因果推理关系的连词：主要有so, for, then, therefore等。

知识点3:表示并列关系的连词

表示并列关系的连词：主要表示“和，补充，增加”之意，包括等。如and, both … and, neither … nor, not only … but (also), as well as等。[5]neither,both,相关知识点

知识点1:表示两者的both, either与neitherHe speaks both English and French. 他既说英语又说法语。(2) either…or… 表示两者或两种可能性中任择其一。如：I will go on business either this week or next week. 我将在这星期或下星期出差。You can either c查看详情>>

如Neither Mary nor Tom came to our party yesterday.
She plays both the piano and the guitar.
He has been to all the countries in the Middle East as well as Europe.[6]as well as,as well,相关知识点

as well as/ as wellⅠ. as well as “也”“不仅…而且”意同：not only … but also具有连词性。① She is my friend as well as my doctor. 他不仅是我的医生，也是我的朋友。② Small towns as well as big cities are being industrialized查看详情>>

He is not only our teacher but also our friend.[7]also,only,相关知识点

not only…but also…用法说明■为了强调，可将not only置于句首，此时其后的句子通常要用部分倒装的形式。如：Not onlyhas she been late three times, she has also done no work. 她不仅仅迟到了3次，她还没干一点活。Not only do they need clothing, but they a查看详情>>