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。連接詞：and, not only…but , neither…nor等例句：I help him and he helps me.Not only did we write to her but also we telegraphed her.Neither I would consult him nor he would ask me for advice.

2) 轉折關系。連接詞：but, yet, still, while, however, when等例句：He failed many times, but he didn’t despair.She has difficulty in learning English, however, she works hard and is making rapid progress.

3) 選擇關系。連接詞：or, otherwise or else, either…or例句：We must hurry, or we’ll miss the train.Either you come to my place or I go to yours.

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.He didn’t work hard, therefore he failed in the examination.

有時也可不用連詞，而用逗號，分號或冒號。如：Hurry up, it’s getting dark.Let’s start early, we have a long way to go.

yet和still是連接副詞，也叫半連接詞。它們是副詞。又起連接作用，但不如and, but, or等強，用了yet或still，前面還可加and或but。He is tired, still he will make another experiment. I got up very early, yet I failed to catch the first bus.

while意義相當于at the same time表示相反和對照，常用來連接兩個意義對立的分句。I like football, while my sister likes basketball. when = and then, just then或at that time, during the time.We were ready to rush away, when the snake moved. while和when作為并列連詞使用時常是放在第二個分句前邊，并有逗號和第一分句隔開。

for表示附加或推斷的理由、原因。therefore比so更正式，and so比較口語化。