連詞conjunction，縮寫為conj.，是用來連接多個詞或句，表示某種邏輯關系的虛詞，可以表并列、承接、轉折、因果、選擇、假設、比較、讓步等關系。
1. 表示平行對等的或選擇的連詞有：and, both....and, as well as neither ..nor, or, either.. or 等。
Wash the white clothes together, and the blue one separately.
那些白衣服放在一起洗， 這件藍的要單洗。
No matter how careful you are, you can neither nor control the future.
不管你多么小心，你都不能預知或控制未來。
Are you against it or for it?
你對此事是反對還是贊成?
2. 表示轉折的連詞有：but ,however, yet, although, on the contrary, while等。
The car was old, yet it was in excellent condition.
這輛車子很舊，但仍處于良好的狀態(tài)。
3. 表示因果關系的并列連詞有：or, so, therefore, as a result ,because of ,due to, owing to, thanks to等。
You'd better put on your sweater, for it's rather cold outside.
你最好把毛衣穿上，外邊相當冷。
4. 表示時間順序的連詞有：at first, then, later, meanwhile, in the end, finally, after that ,since then, for the first time, at last, as soon as, the next moment等。
As soon as my mother went into the bathroom I ran over to Frankie's house.
我媽媽一進浴室，我就跑去弗蘭克家。
5. 表示解釋說明的連詞有：that is(to say),in other words, such as ,for example, for instance, and so on等。
In other words, one person might like something very much while another person might hate the same thing.
換句話說，一個人可能非常喜歡某樣東西，而另一個人卻非常討厭這種東西。
6. 表示遞進關系的連詞有：what's more/worse, what's better, besides, in addition, worse still, moreover, above all, not only...but also等。
What's more, these strategies will keep you out of debt and help you lead a better life!
更重要的是，這些省錢小方法可以讓你遠離債務并且擁有一個更美好的人生！
7. 表示總結的連詞有：in short, in brief, in a word, on the whole, to sum up等。
To sum up, one should think before speaking, even when it means deciding between the truth and a lie.
總之，開口說話之前應該先思考，即使這就意味著必須決定要說實話還是要說謊。