be about to的用法

be about to的用法 be about to do sth的用法 be about to的用法和意思 be about to do 的用法求例句 讲一下be about to 的用法,最后有例句. be about doing 和 be about to do的区别和用法! be crazy about 的用法 be about to do用法,例句 请问be to do.be about to do.be going to do.will do用法的区别. be to的用法, 's 和of所有格的用法区别/ be about to ,be going to ,will be 的区别 英语careful的用法急!请问be carefui with to about的区别, 关于be about to,will,be going to三者的区别,用法及辨析.要权威一点哟~ 求解现在进行时和be about to表将来的用法及不同 英语达人速进!worry about 和 be worry about 的用法. do/does和be about to 在一般将来时中的用法? 有关be puzzled about的用法有be puzzling about的用法吗? be used to 的用法?