一.概念
連詞是用來連接詞,短語,從句或句子的詞.連詞不作成分.
二.相關知識點精講
1.表示并列關系的連詞有:and, both…and…, not only… but also…和neither…nor…等
1)and:和,并且
A:基本用法:
“and”表示 “和”、“并且”的意思,用來連接對等關系的字和字,片語和片語,句子和句子。
I enjoy basketball , football and table tennis.
The weather becomes colder and colder.
B:特別用法:
祁使句后連接and,有條件句作用,此時and=if you…,you’ll…
Go straight on, and you’ll see the library.==If you go straight on, you will see the library.
2)both…and…既…也…,(兩者)都…
A、both…and…構成的詞組作主語時,謂語動詞用復數(shù)。
Both Jim and Kate are from England.
B、both…and…否定句表示部分否定。
You can’t speak both German and English.
Both my father and my mother aren’t doctors.
3)neither…nor…:既不…也不…
neither…nor…連接兩個并列主語時,謂語動詞靠近哪個主語就與哪個主語保持 “人稱”和 “數(shù)”的一致,即采取就近原則。
Neither I nor he has seen the play before.
4)not only…but also…:不但…而且…
not only…but also…連接兩個主語后的謂語動詞也遵循就近原則。
Not only the mother but also the children are ill.
2.表示轉折關系的連詞有:but, however, yet, still,while等。
Mary was a nice girl, but she had one shortcoming.
Tom got up early, yet he failed to catch the train.
He was very tired, still he kept on walking.
Your composition is fairly good, however, there is still some
room for improvement.
Jane is hard working ,while her sister is quite lazy.
3.表示選擇關系的并列連詞有:or, either…or…,whether… or…等。
1)or:或、否則
A:基本用法
or 表示 “或” 的意思,使用于兩者之中選擇一個的時候。
----Is your friend English or American? ----American.
He doesn’t like dumplings or noodles.
B:特別用法
祁使句后連接or ,表 “如果…,否則…”,有轉折的意思,此時 or =if you don’t …,you’ll …
Hurry up, or you’ll be late.=If you don’t hurry up, you’ll be late.
2)either…or…:或者…或者…; 不是…就是…;要么…要么…
either…or…連接兩個并列主語時,謂語動詞靠近哪個主語就與哪個主語保持 “人稱”和 “數(shù)”的一致,即就近原則。
Either you or I am right.
Does either she or they like English?
由either…or…引導的否定句是完全否定。
She isn’t either a student or a teacher.
3)whether…or…不管…還是…
She is always cheerful, whether at home or at school.