until的用法,until前面要用什么时态答:2、如果用在否定句,谓语动词通常是瞬间性动词,如open, start, leave, arrive, finish, stop等,强调主句动作开始的时间。如:I didn't leave the boy until his mother turned up.直到这孩子的母亲来,我才离开。3、until后面的从句中不能用一般将来时,应该用一般现在时代替。所谓的“主将从现”。...
主将从现的问题答:(1)三种形式:肯定句否定句疑问句 动词I (You, He, She, They) worked there at that time.I (You, He, She, They) did not worked there at that time.Did you (I, he, she, they ) work there at that time?动词be I (He, She ) was there at that time.We (You, They ...