How long has he been ________ for his friend? ( wait )
我要怎样才能获得驾驶执照?
What do I ________ _______ ________ _______ ________ a driving licence ?
今天下午吉姆得去趟银行。
Jim _______ _______ ________ ________ _______ ________ this afternoon.
请问第一个为什么不用原形?
追答因为句子后半段是过去式....because it was too late.
这是一个人在叙述过去所发生的事情原由。