按句子的用途可分四种:
1)陈述句(肯定、否定):He is six years old. She didn’t hear of you before.
2)疑问句(一般、特殊、选择、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)感叹句:How clever the boy is! What a clever boy he is!
按句子的结构可分三种:
1)简单句:只有一个主语(或并列主语)和一个谓语(或并列谓语)。
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) 并列句:由并列连词(and, but, or等)或分号(;)把两个或两个以上的简单句连在一起构成。
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)复合句:含有一个或一个以上从句的句子。英语从句包括名词性从句(主语从句,表语从句,宾语从句和同位语从句),定语从句和状语从句等。
The foreign visitors took a lot of pictures when they were at the Great Wall.
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