they are go to school on foot.为什么不对,为什么要用they are going to school_英语解答

they are go to school on foot.为什么不对,为什么要用they are going to school on foot.

人气：138 ℃　时间：2019-09-02 08:30:28

解答

一句话中的“时态”是根据动词的形式而决定.
they go to school .现在时
they are going to school （be动词+现在分词=>进行时）
are go 不能两个动词连着使用.