unless he () to help us ,we shall lose the game

问题描述:

unless he () to help us ,we shall lose the game
A promises
B will promise
C would promise
D had promised
选什么 为什么

A promises unless he promises to help us,we shall lose the game. 逐句用的是一般讲来时shall do,所以从句应该用一般现在时表将来.如果用promised,那shall就应该相应改为should(其实更顺的是改为would)帮助你就...为什么从句用一般现在表将来呢那will promise不是将来时 直接用不是更好吗导until=if not,同上.条件状语从句,主将从现。帮助你就是我的快乐,为梦想而生团队祝你学习进步,不理解请追问,理解请及时采纳!(*^__^*)