陈述句主要是用来传递信息,提供情况(包括肯定和否定的情况)举例子1:(肯定句)他今天早上吃了一个鸡蛋He ate an egg this morning.(否定句)他今天早上没有吃鸡蛋。He didn't eat eggs this morning.举例子2:(肯定句)她已经到学校了。She has arrived at school.(否定句)她还没有到学校。She hasn't been to school yet.