I went to the room,open the door,and went into the room是什么句型 为什么第二个小句不用加and

问题描述:

I went to the room,open the door,and went into the room是什么句型 为什么第二个小句不用加and

在多个并列的句子中,习惯在最后的两个分句间加and,而之前的分句仅用逗号分隔即可.