将下列句子改成否定句 1.My mother can play basketball.

将下列句子改成否定句 1.My mother can play basketball. 英语问题将下列祈使句由肯定句改为否定句或将否定句改成肯定句1、Let the boys play basketball 将下列英语句子改成否定句 问个问题（关于英语）Tom can play basketball 改成否定句 英语翻译I can play basketball（改成否定句）Must I clean the floor now?（ We can play basketball.这句话怎么改成否定句?这句话是什么时态? 将下列句子改成否定句1.He is 10 years old2.my clever sister has a car3. 将下列句子改成否定句和一般疑问句并作肯定回答We play football three times a week. 根据要求完成下列各句Can you play basketball?(做否定回答） 将下列句子改成否定句和疑问句,用can,may,must,can't,mustn't,needn't填空 将下列句子改成否定句,意思不变． 将下列句子改成否定句did you see sharks?