(2)疑问式：将用了现在进行时的句子变成一般疑问句时只需将助动词提前。如：

　　He's reading a magazine.

　　Is he reading a magazine? 他正在看一本杂志吗?

　　(3)否定式：现在进行时的否定式是将否定词not放在助动词之后。如：

　　The dog is drinking its milk.

　　The dog is not drinking its milk. 狗没在喝它的那份牛奶。

　　练习答案 Key to written exercises

　　Lesson 32

　　A

　　1 He is opening the window.

　　2 She is sharpening this pencil.

　　3 She is dusting the cupboard.

　　4 She is emptying the basket.

　　5 He is looking at the picture.

　　B

　　1 What is Mr. Richards doing? Is he cleaning his teeth?

　　No, he is not cleaning his teeth. He is opening the window.

　　2 What is my mother doing? Is she shutting the door?

　　No, she is not shutting the door. She is making the bed.

　　3 What is the dog doing? Is it drinking its milk?

　　No, it is not drinking its milk. Its eating a bone.

　　4 What is my sister doing? Is she reading a magazine?

　　No, she is not reading a magazine. She is looking at a picture.

　　5 What is Emma doing? Is she dusting the dressing table?

　　No, she is not dusting the dressing table. She is cooking a meal.

　　6 What is Amy doing? Is she making the bed?

　　No, she is not making the bed. She is sweeping the floor.

　　7 What is Tim doing? Is he reading a magazine?

　　No, he is not reading a magazine. He is sharpening a pencil.

　　8 What is the girl doing? Is she turning on the light?

　　No, she is not turning on the light. She is turning off the tap.

　　9 What is the boy doing? Is he cleaning his teeth?

　　No, he is not cleaning his teeth. He is putting on his shirt.

　　10 What is Miss Jones doing? Is she putting on her coat?

　　No, she is not putting on her coat. She is taking off her coat.

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