I have been coming to Beijing for 15 years解释一下这句话的意思和用法,但是come不是短暂性动词吗？如果是“我来北京15年了”应该是have lived in Beijing吧

---don't you know our town at all?---no,this is the first time I ＿ here.A was B have been C had come D am coming I didn't know when they ____ again.A.came B.were coming C.had come D.had been coming I don't know when I have been loving lover、i won't love you until i have been 18.I _______ up here night after night for weeks now.You see,I _____ to give you a surprise.A.have come; hoped B.have been coming; hoped C.have come; was hoping D.have been coming; was hoping 请问“I shouldn't have been here.”怎么翻译? i wouldn't have been +过去分词是什么时态?例句 i wouldn't have been scared anyways 求解英语填空题He won't be getting in till about 10:30,_____?A.isn't he B.is he C.will heI think i'm experted to pick him up,_____?A.aren't I B.don't I C.are youNobody else has been tole he's coming,_____?A.is he B.has he C.have theyI suppose i I've coming up here night after night for several weeksI've been coming up here night after night for several weeksI have been coming 的语法我模模糊糊的 新概念英语里面这段话是什么语法啊?新概念第三册第二课,“i have been coming up he night after night”,have been doing 是什么语法啊? The moment I looked forward to _____.A.coming B.is coming C.would come D.have been come要讲解的哟! i have been coming here for weeks now 中now的用法?意思?是强调什么吗? James has just arrived.but i didn't know he 【 】until yesterday.A will come B was coming C had been coming D came 求明确解释. I didn't know when they____again.A.came B.were coming C.had came D.had been comintg James has just arrived,but I didn't know he__until yesterday.A was coming Bhad been comingA还是B, I have been selling I have been trying I have ever been