第一类：动词短语clean the floor 扫地clean the house 打扫房间collect stamps 集邮come back 回来come from 来自……come here 来这里come in 进来come on 过来/加油come to tea 来喝茶
☆美国英语母语人士点评:Lesson is normally what you're studying IN class， and class is just used to talk about the actual course you're taking. Lesson通常是指你在课堂上学习的内容，class只是用来谈论你所上的实际课程。
