精讲课 笔记随视频锁定
合并成并列句

右侧笔记支持独立滚动。边听名师连读拆解,边对照右侧的语法事实与统计数据笔记。

简单句 并列句(逗号可选)
I knocked at the door. He did not open it. I knocked at the door, but he did not open it.
He must be mad.He must be very wise. He must be either mad or very wise.
My sister went shopping. I went shopping. Both my sister and I went shopping.
We got very tired.We got very hungry. We got not only very tired but very hungry as well.
It was three o' clock.We could not get lunch.We had a cup of coffee. It was three o' clock, and we could not get lunch, so we had a cup of coffee.
I wash my face.I brush my teeth.I comb my hair every morning. I wash my face, brush my teeth, and comb my hair every morning.(严格语法中最后的,and的逗号不能省略~)