i can sing 改成否定句

Tom can sing and dance.（改成否定句） I can skate well改成否定句 i can dance and sing（改为否定句） I can sing some English songs变为否定句 SHE CAN SING WELL. [变否定句】 she can sing and dance 否定句 I can see an apple 改成否定句 怎样把I can see you改成否定句 I can ride my bike.(改成否定句) I can make the bed改成否定句 I can spell the word 改成否定句 I can see Billy.(用not改成否定句)