- S+V （主语+谓语）
- S+V+P (主语+系+表语)
- S+V+O （主语+谓语+宾语）
- S+V+O+O （主语+谓语+间接宾语+直接宾语）
- S+V+O+C （主语+谓语+宾语+宾补）
- the man is back.
- they are back.
- he was back
- They were back
- they have been back.
- the man is a teacher. 现在时
- mary's new dresses are colorful.
- my mother was in the kitchen. 过去时
- he has been a teacher for 3 years. 完成时
在am，is，are，was，were后面加 not 即可
- the man isn't back.
- I am not back.
- they aren't back.
- he was't back.
- they weren't back.
- Is he a teacher? -yes,he is / no,he isn't
- Are you a teacher? -yes,i am/no,I am not.
- were they teacher? -yes,they were/no,they weren't
Is he a doctor? - NO,he isn't
Were they in the classroom yesterday? -Yes,they were
They weren't in the classroom yesterday.
- 主格代词： I，he，she，it，you，we，they
- 宾格代词： me，him，her，it，you，us，them
- 我喜欢TA。 I like him/her/it.
- 他们认识他。 They know him.