知識要點：
1. 并列句：由兩個或兩個以上的簡單句并列連接起來的句子叫并列句。
2. 并列句的基本句型：簡單句 + 并列連詞 + 簡單句
3. 并列句的類型：
1) 并列關系（聯合關系）。連接詞：and, not only…but (also), neither…nor等
例句：I help him and he helps me.
我幫助他，他也幫助我。
Not only did we write to her but also we tele graphed her.
我們不僅給她寫信而且還給她發了電報。
Neither I would consult him nor he would ask me for advice.
我不想與他商量，他也不會征求我的意見。
2) 轉折關系。連接詞：but, yet, still, while, however, when等
例句：He failed many times, but he didn’tdespair.
他失敗多次但并沒有氣餒。
She has difficulty in learning English, however, she works hard and is making rapid progress.
她學習英語有困難，然后她學習努力，進步很快。
3) 選擇關系。連接詞：or, otherwise or else, either…or
例句：We must hurry, or we’l miss the train.
我們必須快點，否則會趕不上火車。
Either you come to my place or I go to yours.
或者你到我這兒來，或者我到你那去。
4) 因果關系。連接詞：for, so, thus, therefore, and so
例句：We had better stay at home, for it was raining.
我們最好呆在家里，因為天正在下雨。
He didn’t work hard, therefore he failed in the examination.
他學習不努力，因此這次考試不及格。
有時也可不用連詞，而用逗號，分號或冒號。如：
Hurry up, it’s getting dark.
快點，天要黑了。
Let’s start early, we have a long way to go.
我們要早動身，因為路很遠。