the earrings must be a present for his mother语法错误?

the earrings must be a present for his mother语法错误? his,earrings,might,the,present,a,for,mother,be.(连接句子) 填上介词：Tom bought earrings for his mother ___presents The scarf ___ a present for his mother . A might B might bel 同义句同义句 He is going to buy a present for his mother.----- he 同义句 He is going to buy a present for his mother.----- he goi jim has bought a present for his mother变为否定句 a bought his for mother yesterday present he连词成句 问一个英语问题___his great joy,his mother bought a new present for Buy a present for mother英语作文 Tom said he would be back _.A.at present B.for the present C a man decide to give his mother a birthday present.