在学习英语的过程中，语法是构建语言能力的重要基石。为了帮助同学们更好地掌握八年级下册的英语语法知识，我们特别准备了一组精选的练习题，并附上详细的答案解析。希望通过这些练习，大家能够巩固课堂所学，提升语法运用能力。
练习题部分
一、选择题
1. The boy ________ to school every day.
A. walks
B. walk
C. walked
D. walking
2. She ________ a book last night.
A. read
B. reads
C. reading
D. was reading
3. They ________ their homework yesterday.
A. finished
B. finish
C. finishes
D. finishing
4. If it ________ tomorrow, we will stay at home.
A. rains
B. rain
C. raining
D. rained
5. I ________ my friend last week.
A. met
B. meet
C. meeting
D. meets
二、填空题
1. He ________ (like) playing basketball.
2. We ________ (go) to the park every Sunday.
3. She ________ (not watch) TV last night.
4. They ________ (study) for the exam now.
5. My sister ________ (be) very happy today.
三、改写句子
1. She is reading a book. (改为过去式)
________________________________________
2. They are having lunch. (改为一般疑问句)
________________________________________
3. John played football yesterday. (改为否定句)
________________________________________
4. She will go shopping tomorrow. (改为现在进行时)
________________________________________
5. They have already finished their homework. (改为一般过去时)
________________________________________
答案解析
一、选择题
1. A. “walks”表示习惯性动作，主语为单数第三人称。
2. A. “read”表示过去发生的动作。
3. A. “finished”表示过去完成的动作。
4. A. “rains”用于条件状语从句中，遵循“主将从现”的原则。
5. A. “met”表示过去发生的事情。
二、填空题
1. likes
2. go
3. didn't watch
4. are studying
5. is
三、改写句子
1. She read a book.
2. Are they having lunch?
3. John didn't play football yesterday.
4. She is going shopping now.
5. They finished their homework yesterday.
通过以上练习，希望大家能够更加熟练地掌握八年级下册的英语语法知识。语法学习需要不断的练习和积累，希望大家能够坚持下去，取得更大的进步！
