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

The boy could sing some English songs.(该为否定句)
The boy couldn't sing any English songs.
could能,否定是：couldn't,后跟动词原形,否定句中一般some要变成any
翻译：那个男孩不会唱英语歌曲

The boy couldn't sing any English songs.

The boy can't sing any English song .

The boy couldn't sing any songs except English songs.

The boy couldn't sing some english songs.

The boy couldn't sing English songs.