he hasn't come yet是什么时态?

he hasn't come yet是什么时态? 连词成句:seems,he,it,come,back,hasn't,yet.顺便翻译一下中文。 he hasn't had breakfast yet. he hasn't decided it yet.请译出 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? He hasn't yet arrived . He may, _____, come later.选择题?He hasn't yet arrived . He may, _____, come later.A:but B:though C:or D:however答案是D 为什么? 还有怎么翻译?怎么翻怎么翻? 楼下两家翻译不一样~ He promised that he would come,but he hasn't turned up yet.为什么用that和用would和yet? _____everyone arrived yet?no,mike___come yet.he ___in a minute1.have,doesn`t,comes 2.has,doesn`t,is coming 3.have,hasn`t,will come 4.has,hasn`t,will come Me.Wang was not___home,he hasn't come back yet.A.in.B.to.C.at.D.go选哪个 He hasn't come yet.what do you consider ---to him?为什么选has happened而不是happening 不是consider doing Mr Huang____to Kunming.He hasn't come back yet.A.goes B.went C.has gone D.go 选哪个并解释原因He hasn't come to class yet.What do you think______?选哪个?麻烦解释原因（最好是ABCD四选项具体分析）He hasn't come to class yet.What do you think______?A.was hanppened to him B.has happened to him C.d Lucy hasn't come yet.I don't know what______(happen) to her.答案是has happened ,为什么呢? yet hasn`t he finished work.不知怎么连句? 翻译he hasn't gotten a copy yet 求一道时态题目：Mr. Brown hasn't come yet. When he ___(come), we _____(begin) the meeting.越快越好,分分钟解决~~ why hasnt she come yet?Nobody knows.Nobody knows _____ _____ ______come yet He was ___ (suppose) to be here by nine.But he hasn't come yet.用所给单词的适当形式填空!能否说明原因?