i don't know if i ___ free tomorrow .if i ___ free ,i will fly to beijing with my brother . a am, a

问题描述:

i don't know if i ___ free tomorrow .if i ___ free ,i will fly to beijing with my brother . a am, a
bwill be ,will becam ,will bedwill be ,am

Dwhy前半句我明天是否有空是将来时,所以要用will be后半句主从句都是将来时,所以主句将来时,从句为一般现在时,用am~~希望对你有所帮助,望采纳~~~~~~~