例句：Cat eats fish.
She plays the violin.
Li ming plays basketball.
总结：
1.功能：涉及一个动作，表达一个动作时，通常会用到主谓宾结构。
2.各种句子成分的位置：动词在主语后面，主语在最前面，宾语跟在谓语动词的后面
3.各种句子成分的词性：主语可以是名词或代词，谓语只能是动词，宾语和主语类似，可以是名词或代词。
二、主语 系动词（be动词） 表语（简称主系表结构）
例句：She is a student.
He is very cool.
My mother is a teacher.
总结：
1. 功能：涉及描述、说明一个人或事物的时候，会用到主系表结构。
2. 各种句子成分的位置:主语在系动词（be动词）前面，be动词在中间，表语在Be动词后面。
3. 各种句子成分的词性：主语可以是名词或代词，系动词通常是be动词，表语可以是形容词或名词。
分析下列句子的句子成分：1. Tom is a student.
2. He is thin.
3. I am tired.
4. We are primary students.
5. The bag was lost.
6. The boy was so foolish.
7. They were kind.
8. She is in the room.
9. The books are on the desk.
10. Snow is white.
11. Kate was here yesterday.
12. My father became a teacher last year.
13. The weather gets hot in summer.
14. She looks beautiful.
15. The flower smells good.
16. We were very happy.
17. You are right.
18. The soup tastes delicious.
19. The chair is yours.
20. The children are asleep.
21. The story is interesting.
22. He feels better today.
23. The leaf turns green.
24. The weather is cold in April.
25. The little girl is six.
26. My work is to look after the baby.
27. His job is taking care of the patient.
28. The girl is very pretty.
29. He went mad.
30. He often gets up at 6:00.
31. He likes play basketball.
32. L enjoy listening to music.
33. She is very funny.
34. L miss her .
35. She wants to be a great girl.
36. She is my mother.
37. He is my brother.
38. l often read books in the afternoon.
39. She doen’t like learn math.
40. He want to drink alcohol.
41. The cat likes playing with the girl.
42. She is very beautiful.
