1.He can sing some English songs,so can I.(同义句) ----- ------he------ -------I can sing some English songs.

问题描述:

1.He can sing some English songs,so can I.(同义句) ----- ------he------ -------I can sing some English songs.
2.I suppose he will help us clean the classroom.(否定句)
I----suppose he------help us clean the classroom.

Not only,but also
don't,will