主系表结构的练习找出下面句子中的主语、系动词及表语，并指出主语和表语分别是由什么词性或词类来充当的。1 Tom is a student. 2 He is fat. 3 I am tired . 4 We are students. 5 The bag was lost . 6 The boy was 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 in 1978. 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 I stayed awake all the night. 25 The weather still remained cold in April. 26 The little girl is six. 27 My work is to look after the baby. 28 His job is taking care of the patient. 29 The girl is very pretty. 30 He went mad. 按句子后面括号内的要求改写句子1. Lily is American. （改为一般疑问句） 2. I am from Sichuan. （改为否定句） 3. He looks puzzled. （改为一般疑问句） 4. They feel very excited. （改为否定句） 5. I am not feeling well. （改为肯定句） 6. The news sounds very bad. （改为一般疑问句） 7. We are all here. （改为一般疑问句） 8. The food tastes delicious. （改为一般疑问句） 9. Its name is Mimi. （改为否定句） 10. I feel well. （改为否定句）