在英语语法中，非谓语动词是一个非常重要的知识点。它包括不定式、动名词和分词三种形式，这些形式在句子中不担任谓语的作用，但可以用来表达各种语法功能。为了帮助大家更好地掌握这一知识点，我们准备了一系列专项练习题。

一、选择题

1. The teacher told us ________ the window.

A. to clean B. cleaning C. cleaned D. clean

正确答案是A。这里的不定式to clean表示具体的动作。

2. I enjoy ________ with friends.

A. talk B. talking C. to talk D. talked

正确答案是B。动名词talking表示习惯性的动作。

3. Seeing is believing.

A. 主语 B. 谓语 C. 宾语 D. 状语

正确答案是A。这里seeing是动名词作主语。

4. Having finished his homework, he went out to play.

A. 主语 B. 谓语 C. 宾语 D. 状语

正确答案是D。现在分词短语Having finished his homework作状语，表示伴随状态。

5. He was seen ________ the room yesterday.

A. enter B. entering C. entered D. to enter

正确答案是A。感官动词see后面接不定式作宾补，表示看到某人做某事的过程。

二、填空题

6. She likes ________ (read) books on weekends.

7. My father often spends time ________ (fish) by the river.

8. The book is worth ________ (read).

9. They stopped ________ (talk) when the teacher came in.

10. We heard someone ________ (sing) in the next room.

三、改错题

11. The boy was made cry by his teacher.

改正：The boy was made to cry by his teacher.

12. He kept me waiting for hours.

改正：He kept me wait for hours.

13. I have no interest in listen to music.

改正：I have no interest in listening to music.

通过以上练习，希望大家能够更加熟练地运用非谓语动词。记住，不定式通常表示将来的动作或具体的动作；动名词表示习惯性或抽象的动作；而分词则可以用来修饰名词或构成复合结构。不断练习和总结规律，相信你们一定能在非谓语动词方面取得进步！