小学英语语法求助

2. We sang some English songs.
否定句： We didn’t sing some English songs. some 改成any
一般疑问句： Did you sing some English songs? 同上
3. They played football in the playground.
否定句：They didn’t played football in the playground. played改成play
一般疑问句：Did they played football in the playground? 同上
2) 这棵树要比那棵树高. This tree （ taller ） than that one. taller前面加一个is
4) 谁比你重? （ Whice haevier ） than you. 改为 Who is heavier than you？