The boy could sing some English songs.(该为否定句)

The boy could sing some English songs.(该为否定句) the boy can sing some english songs 改为否定句the boy( )( )( )eng L could sing some english songs否定句 I can sing some English songs变为否定句 l can sing some English songs改为否定句 The little girl can sing English songs.(改为否定句) My little brother can sing English songs的否定句 Both you and Tom sing English songs 改为否定句 she can sing english songs and french songs well改为否定句 He can sing some songs 否定回答 We sang some English songs改为否定句 We sang some English songs.的否定句是什么