主要有and, or, but, so。可將兩個單句連接起來，使其變成複句。
1：句 + (,) 對等連接詞(and/or/but/so) + 句.
The young couple sang and (the young couple) danced all night.
Get up earlier, or you'll be late.
It is hot in summer in Kaohsiung, but it is not cold in winter.
He was sick, so he didn't go to school yesterday.
1. 句, for＋句.
You should stop smoking, for it is not good for your health.
2. 句, yet/while/whereas＋句.
She didn't know me, yet she helped me.
= She didn't know me, while she helped me.
= She didn't know me, whereas she helped me.
1. He went to Hong Kong in 1980 _______ (he) has lived
there ever since.
2. She was exhausted ______ she didn't go to the party
解答： 1. A2. B