1-16why hasn't he come?( )on time,we will have to put off the trip.1.if he doesn't come2.if he won't come3.if he shouldn't come4.if he hadn't come

1-16why hasn't he come?( )on time,we will have to put off the trip.1.if he doesn't come2.if he won't come3.if he shouldn't come4.if he hadn't come I'm tired of wondering why hasn't he called,为什么不是I'm tired of wondering why he hasn't called? --why is he so upset --he___ his pen yesterday.it ___ yet.A,was lost;hasn't found B.was lost;hasn't been found C.lost;hasn't find D.lost;hasn't been found i don't know why he hasn't come yet.这句话里为什么要用hasn't?可以用is't吗? -Why hasn't Jimmy come today? 英语翻译刚才那一句是问还有回答----I don't think so.If true,why hasn't he himself been successful? he hasn't come yet是什么时态? he hasn't had breakfast yet. he hasn't decided it yet.请译出 But he hasn't got ______money. 英语翻译还有回答 ---I don't think so .If true,why hasn't he himself been successful?sorry that 改为than He hasn't _______ that he is wrong (that) can you tell me _____?答案有两个：why he wouldn't come; why he hasn't come 应该选那个呢可是答案选的是前面那个，让我非常困惑 虚拟语气he wishes he haven't(1)/hasn't(2)?选（1）还是（2）呢? -Why hasn't Jimmy come today?-because he has to _______ his sick mother who is in hospital.A.look for b.look after C.take care Why hasn't Mr.Li come to work today?()he has gone to Beijing to have a meeting.为什么选because The road is under construction and that is _____ he hasn't arrived.A.the reason at which B.why C.the reasonwhich D.what i haven't finished my homework yet.he hasn't either 不明白为什么是“he hasn't either