1.简单句
只包含一个主谓结构的句子叫简单句。如：
Neither Bruce nor Susan can speak French.
Mother bought a new schoolbag for me at the beginning of this term.
2.并列句
由两个或两个以上并列而又相互独立的简单句构成。两个简单句常由并列连词连在一起。常见的并列连词有and，but，or，so，for等。如：
Go straight on and you will find a toilet.
I would like to go with you, but I can't.
Hurry or you will be late.
She practices every day, so she plays the piano very well.
It must have rained last night, for the ground is wet.
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