1.The boy isn't playing basketball. 2.She isn't closing the door now. 应该记住，所有be动词的否定形式都是在后面加not。
1.The boy is not(isn't) playing basketball. 2.She is not(isn't) closing the door now.
1.The boy isn't playing basketball. 2.She isn't closing the door now.
1.The boy isnot playing basketball. 2.She isnot closing the door now.
1. The boy is not (isn't) playing basketball. 2. She is not (isn't) closing the door now.
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