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連接詞的使用規則

連接詞是用來連接單字、片語或子句的詞。最常用的連接詞包括“and”、“but”和“or”。連接詞包括三種類型:並列連接詞, 從屬連接詞, 相關連接詞

連接詞的種類

連接詞的種類 連接詞的作用 連接詞的例子

並列連接詞

連接在語法上對等的內容

for, and, nor, but, or, yet, so

從屬連接詞

引出從屬子句

because, if, although, since, until, and while

相關連接詞

成對出現,並連接在語法上對等的內容

either/or, neither/nor, not only/ but also

並列連接詞

並列連接詞連接在語法上對等的單字、片語或子句。常用的並列連接詞包括:for, and, nor, but, or, yet, so。可以採用“F.A.N.B.O.Y.S.”這個便於記憶的詞頭拼接詞記住上述七個並列連接詞。

例句
This study investigates the effects of Drug A and the placebo on the patients.
例句
You can choose to take the test or write an essay to pass the class.

當使用並列連接詞連接兩個獨立子句時,在並列連接詞前面要加逗號

例句
She was unhappy with the test results, yet she refused to take the test again.
例句
I have only been here for one week, so I know practically nothing.
錯誤
You should invite Mary, and Jane to the party.
正確
You should invite Mary and Jane to the party.

從屬連接詞

從屬連接詞可以把子句和主句連接起來。從屬連接詞用來表示因果關係、對比、時間或地點的過渡或條件關係。最常用的從屬連接詞包括:after, although, before, even though, if, in case, till, whenever, unless, while

表示因果關係

表示因果關係的從屬連接詞包括:because, since, as, due to, as if

例句
I could not go to class because I did not feel good.
例句
Due to his poor attendance, the professor had to fail him.

表示對比關係

表示對比關係的從屬連接詞包括:although, though, whether, while, even though

例句
While she plans to go to Paris for spring break, he plans to go to Tokyo.
例句
Although he is much younger than me, he is much smarter than most of my classmates.

表示條件關係

表示條件關係的從屬連接詞包括:if, unless

例句
Unless you leave now, you will be late.
例句
If he decides to take the offer, he will have to move out soon.

表示時間或地點的過渡關係

表示時間或地點的過渡關係的從屬連接詞包括:where, everywhere, after, until, as soon as, before

例句
Don't forget to clean your room as soon as you get home.
例句
This is the place where I grew up.

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相關連接詞

相關連接詞是成對使用的單字,用來連接一個句子中的兩個部分或使其彼此關聯。最常用的相關連接詞包括:either/or, neither/nor, not only/but also

在使用相關連接詞時,它們之間通常無需用逗號隔開。

錯誤
I will either have a sandwich, or salad for lunch.
正確
I will either have a sandwich or salad for lunch.
錯誤
Neither the boy, nor his brother want to help their mother.
正確
Neither the boy nor his brother want to help their mother.

但是,當相關連接詞(例如“not only/but also”)用於分隔兩個獨立子句時,連接詞前面應加逗號。

錯誤
Not only did she start playing the piano at a very young age but her mother also taught her to compose music.
正確
Not only did she start playing the piano at a very young age, but her mother also taught her to compose music.

以連接詞開頭的句子

很多人說以連接詞開頭的句子在語法上不正確。然而事實並非如此。雖然不建議在太多的句子開頭使用連接詞(尤其在學術寫作中),但適度使用是完全沒有問題的,而且有些時候必須用連接詞開頭寫句子。

例句
She wanted to go home. But he did not want to.
例句
Although I do not like the restaurant, I will go if you want me to.
例句
Either this dress or that pair of pants is fine.

連接詞和逗號的聯用規則

無論何種類型的連接詞,連接詞與逗號聯用的規則都非常簡單,即使用連接詞連接兩個獨立子句時,連接詞前面應該使用逗號。

例句
The professor explained the assignment in detail, but the students did not seem to understand it.
例句
The weather is nice, but I don't think we should go on the picnic.

但是,當用連接詞連接一個獨立分句和一個從屬分句時,連接詞前面不應該使用逗號。

錯誤
The professor explained the assignment in detail, and gave out the workbook.
正確
The professor explained the assignment in detail and gave out the workbook.
錯誤
The weather is nice, but a little bit chilly.
正確
The weather is nice but a little bit chilly.

需要注意的是,使用逗號連接兩個獨立子句也有例外,即如用連詞連接的兩個獨立子句都很短,則可以省略連詞前面的逗號。

錯誤
I cooked, and he cleaned.
正確
I cooked and he cleaned.

在主句前的介紹性子句、片語或單字後面要用逗號。用於這些子句或片語的連接詞通常包括:after, although, as, if since, when, while。

例句
While I do my homework, you go do the dishes.
例句
If you do not want to go to the party, you can stay home.