必修一Unit 1 Friendship grammar课时作业

第一部分：基础练习

一：指出下列句中主语的中心词

① The teacher with two of his students is walking into the classroom.

【答案】 teacher

【解析】名词做主语

② There is an old man coming here.

【答案】 man

【解析】名词做主语；there be句型中主语在后面

③ The useful dictionary was given by my mother last year.

【答案】 dictionary

【解析】名词做主语

④ To do today's homework without the teacher's help is very difficult.

【答案】 To do ....

【解析】动词不定式做主语

二：选出句中谓语的中心词

① I don't like the picture on the wall.

　　A. don't B. like C. picture D. wall

【答案】 B

【解析】及物动词作谓语.

② The days get longer and longer when summer comes.

　　A. get B. longer C. days D. summer

【答案】A

【解析】系动词作谓语

③ Do you usually go to school by bus?

　　A. Do B. usually C. go D. bus

【答案】C

【解析】不及物动词作谓语动词，do只是助动词

④ There will be a meeting at the library this afternoon.