1、按句子的用途
分四種：
1）陳述句（肯定、否定）：He is six years old; She didn't hear of you before.
2）疑問句（一般、特殊、選擇、反意）：Do they like skating? How old is he? Is he six or seven years old? Mary can swim, can't she?
3）祈使句：Be careful, boys; Don't talk in class
4）感嘆句：How clever the boy is!
2、按句子的結構
可分三種：
1）簡單句：只有一個主語（或並列主語）和一個謂語（或並列謂語）。
e.g. He often reads English in the morning. Tom and Mike are American boys.She likes drawing and often draws pictures for the wall newspapers.
2) 並列句：由並列連詞（and, but, or等）或分號（；）把兩個或兩個以上的簡單句連在一起構成。e.g. You help him and he helps you. The future is bright; the road is tortuous.前途是光明的，道路是曲折的。
3）複合句：含有一個或一個以上從句的句子。複合句包含：名詞性從句（主語從句、賓語從句、表語從句和同位語從句）、定語從句和狀語從句等。e.g. The foreign visitors took a lot of pictures when they were at the Great Wall.
簡單句的五種基本句型
1、主語+系動詞+表語：e.g. He is a student.
2、主語+不及物動詞：e.g. We work.
3、主語+及物動詞+賓語：e.g. Henry bought a dictionary.
4、主語+及物動詞+雙賓語（間接賓語+直接賓語）：e.g. My father bought me a car.
5、主語+及物動詞+複合賓語（賓語+賓補）：e.g. Tom made the baby laugh.
注：其他各種句子都可由這一種基本句型擴展、變化或省略而構成。
並列句的分類
（注：圖中第二句動詞筆誤，你一定看到了吧。）
1、表示連接兩個同等概念，常用and, not only…but also…, neither…nor…等連接。e.g. The teacher's name is Smith, and the student's name is John.
2、表示選擇，常用的連詞有or, either…or…等。e.g. Hurry up, or you'll miss the train.
3、表示轉折，常用的連詞有but, yet, while, when等。e.g. He was a little man with thick glasses, but he had a strange way of making his classes lively and interesting.
4、表示因果關係，常用的連詞有so, for等。e.g. August is the time of the year for rive harvest, so every day I work from dawn until dark.
主從複合句的分類
1. 名詞性從句
從句起名詞的作用，包括賓語從句，主語從句，表語從句，同位語從句。
That he will come here to see us is certain. 主語從句
He said that he was from Hunan Province. 賓語從句
My dream is that I will have my own company. 表語從句
His suggestion that we be there waiting for them is reasonable. 同位語從句
2. 形容詞性從句
形容詞起修飾限定的作用，所以形容詞性從句就是定語從句。
The prize will go to the writer whose story shows the most imagination.
Ted came for the weekend wearing only some shorts and a T-shirt, which is a stupid thing to do in such weather.
Mary was much kinder to Jack than she was to the others, which, of course, make all the others upset.
3. 副詞性從句
副詞多作狀語，所以副詞性從句指各種狀語從句。
I had felt hungry beforeI arrived home. 時間狀語從句
Make a mark where you have problems.地點狀語從句
They will come home after school if they finish their work. 條件狀語從句
As it's dark, we'd better go off work now.原因狀語從句
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