1.The boy is playing basketball.（改为否定句）2.She is closing the door now.（改为否定句）
热心网友
1 The boy isn't playing basketball.2 She isn't closing the door now.
热心网友
1.The boy is not(isn't) playing basketball.2.She is not(isn't) closing the door now.
热心网友
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。
热心网友
1.The boy isn't playing basketball.2.She isn't closing the door now.
热心网友
1.The boy isn't playing basketball.2.She isn't closing the door now.
热心网友
1.The boy isnot playing basketball.2.She isnot closing the door now.
热心网友
is后面+not
热心网友
1. The boy is not (isn't) playing basketball.2. She is not (isn't) closing the door now.