he has just come out a book为什么是错的

he has just come out a book为什么是错的 He has just come back.现在完成时.He has just come back.为什么不是用came?has/have+动词过去式? My grandfather_____.He is still very tireds.a.has just come back b.has already come back c. have yet come backd.have just come back He went out just He has just gone out. 为什么说它对过去有影响?He went out juHe has just gone out. 为什么说它对过去有影响?He went out just now不是一样的吗? His new book has just 什么.let's go and buy one.A come over B come on C come down D come out He has just come back form a southern city 为什么用a he has just come here .No one knows ( ) 为什么用 where he is from 而不用 where he was from He has _______ gone out.A just B now C soon He has _______ gone out. A just B now C soon just表什么时态?The author’s new book has just —— —— .空上添come out .为什么不用came?那只是just表什么时态？ He thought he couldn’t pass the exam buthe just has found out he passed it.该句子有无语病? he's really come out of his shell.这里为什么’s是has? 这句话对吗~呵呵The result of my IELTS examination has come out,and I just got 5. Wenxuan's new book has just( ) Let's go and buy one A come over B come down C come on D come outWenxuan's new book has just( ) Let's go and buy one!A.come over B.come downC.come on D.come out James has just arrived ,but I did not konw he ___ until yesterday.a.will come b.was coming c.has come d.comes He's just come home.这里的‘s是has还是is啊?如果是has那么come不就应该是came了吗? His first book ___ when he was only 16.A.published B.has published C.came out D.has been come out顺便说一下理由,