5. 句意：—海伦在……衣服吗？—是的，她是。根据答语是肯定回答，问句是现在进行时的一般疑问句，主语是第三人称单数，be用is， wash- washing正在洗，故答案为 Is ，washing.
题型：连词成句
※难度：一般
【题目】连词成句。
1. breakfast , my , kitchen , sister , the , is , in , cooking (.)
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2. you , what , doing , are (?)
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3. the , is , in , my , bedroom , busy , mother (.)
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4. dog , is , the , in , park , the , sleeping (.)
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5. now , doing , is , brother , your , what (?)
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【答案】1. My sister is cooking breakfast in the kitchen. 3. What are you doing? 3. My mother is busy in the bedroom. 4. The dog is sleeping in the park. 5. What is your brother doing now?
【解析】
1. breakfast早饭 , my我的 , kitchen厨房 , sister姐妹 , the这 , is是 , in在……里 , cooking正在做饭，根据所给的句号，可知句子是一个陈述句，根据所给词义可以连成句子：我妹妹正在厨房里做早餐。故答案为 My sister is cooking breakfast in the kitchen.
2. you你 , what什么 , doing正在做 , are是，根据所给的问号，结合词义，可知句子是一个特殊疑问句：你正在做什么？故答案为 What are you doing?
3. the这 , is是 , in在……里 , my我的 , bedroom卧室 , busy繁忙的 , mother妈妈，根据所给的句号，可知句子是一个陈述句，根据所给词义可以连成句子：我妈妈在卧室里很忙。故答案为 My mother is busy in the bedroom.
4. dog狗 , is是 , the这 , in在……里 , park公园 , the这 , sleeping正在睡觉，根据所给的句号，可知句子是一个陈述句，根据所给词义可以连成句子：狗正在公园里睡觉。故答案为 The dog is sleeping in the park.
5. now现在 , doing正在做 , is是 , brother弟弟 , your你的 , what什么，根据所给的问号，结合词义，可知句子是一个特殊疑问句：你弟弟现在在干什么？故答案为 What is your brother doing now?
题型：句型转转
※难度：一般
【题目】按要求改写句子。
1. They are singing in the classroom. (改为一般疑问句并作肯定回答和否定回答)
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2. They are doing housework. (分别改成一般疑问句和否定句)
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3. The students are cleaning the classroom. (改为一般疑问句)
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4. I'm playing the football on the playground. (对划线部分进行提问)
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5. Tom is reading books in his study. (对划线部分进行提问)
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【答案】1. —Are they singing in the classroom?
—Yes, they are.
—No, they aren't. 2. Are they doing housework?
They are not doing housework. 3. Are the students cleaning the classroom? 4. What are you doing on the playground? 5. What is tom doing in his study?
【解析】
1. 句意：他们正在教室里唱歌。本句是现在进行时，变一般疑问句，将are提到句首，肯定回答是 Yes, they are. 是的，他们是。否定回答是 No, they aren't.句意为他们在教室里唱歌吗？是的，他们是。不，他们不是。故答案为 —Are they singing in the classroom?—Yes, they are.—No, they aren't.
2. 句意：他们在做家务。本句是现在进行时，变一般疑问句，将are提到句首，否定句在are后面接not，句意为他们在做家务吗？他们不做家务。故答案为Are they doing housework?They are not doing housework.
3. 句意：学生们正在打扫教室。本句是现在进行时，变一般疑问句，将are提到句首，句意为学生们在打扫教室吗？故答案为 Are the students cleaning the classroom?
4. 句意：我在操场上踢足球。根据划线部分是做某事，用疑问词what什么引导，后面接一般疑问句，第一人称变第二人称you你，be用are，句意为你在操场上干什么？故答案为 What are you doing on the playground?
5. 句意：汤姆在书房读书。根据划线部分是做某事，用疑问词what什么引导，后面接一般疑问句，将is提到句首，句意为汤姆在书房里干什么？故答案为 What is Tom doing in his study?
