grandpa is wriing a letter.brother is doing homework.mom is

grandpa is wriing a letter.brother is doing homework.mom is brother homework is doing 1.my grandpa has a computer怎么改为一般疑问句 2.his brother is doing grandpa is writing a letter 变一般疑问句... There is a letter for/to/from grandpa? writing my a letter brother is my,is,his,doing,brother,homework 连词成句 i am doing my homework w_____my brother is watching TV writing my a letter brother brother is( . )连词成句? My brother is very busy.He is doing his homework改成同义句 改写My brother is very busy . he is doing his homework .my bro no,his grandpa is a writer 问句 what is your brother （电视台记者） w