I left Beijing yesterday. 请帮我划分一下句子成分.我主要想问leave这个词什么时候及物,什么时候不及物

i left for beijing (yesterday)对yesterday提问___ did you ___for Beijing? Last year ,I left Beijing.I had worked there for two years.用定语从句合并 I saw Li Lei yesterday.We hadn't seen each other __I left Beijing. I left I left Beijing in 2005.I have lived in Shenzhen since then.把这两个句子合并在一起? I saw Janson yesterday.We haven't seen each other since we left Beijing.这句话用现在完成时对吗?为什么这句话却用过去完成时I saw Li Lei yesterday.We hadn't seen each other since I left Beijing. since then,I （ ）beijing A.have left B.left C.have leave D.leaving但for和since不是不能和短暂性动词连用么? 英语代指是怎么表现的 比如it代指时间：It is ten years since I left Beijing. my parents left( ) beijing last week so i was at home by myself括号中填介词写原因 I left a backpack on the train to beijing the other day否定句疑问句和肯定回答否定回答 I still remember that day.You left for Beijing on that day.请问把这两句话改成定语从句,哪句正确I still remember that day when you left for Beijing.I still remember that day on which you left for Beijing. 一句英语怎么理解?A good frieng of mine from when I was born showed up at my home right before I left for beijing. A good friend of mine from when I was born showed up at my home right before I left for Beijing.这是个什么从句? A good friend of mine from when I was born showed up at my home right before I left for Beijing.为什么不用where I am ___from beijing I(w ) in beijing I was in Beijing( ) 56.By the time you get to Beijing tomorrow,I ________ for Shanghai.A) am leavingB) should have leftC) will leaveD) have already left