1.Our teacher has just left.　　　　　　　　　　　　　　　 　

1.现在完成时态表示过去发生的动作对现在造成的影响或结果。本时态标志词：　

already (“已经”，用于肯定句中，放在have /has之后或句尾)； 　

yet (“仍然”“还”，用于疑问句或否定句的句尾) 　

just(“刚刚”，放在have /has之后)； 　

before(“以前”，放在句尾)；　

ever(“曾经”，放在have /has之后) 　

never (“从没有”，在have /has之后)　

例句：　

9.I have just/ever/already/never seen the movie. Have you ever heard of the man before?　

本单元语法讲解　

现在完成时　

8.I have been a teacher since ten years ago(for ten years.) (不能用become)　

7.He has been dead for two years.(不能用die)=he died two years ago.　

6.I have been a student here for a year.　　　　　　　　　　　　 我成为这的学生有一年了. (不能用become)　

　 =I became a student here a year ago.　

5.I’ve never been to an aquarium.　　　　　　　　 我从没去过水族馆.　

4.How long has he been in 　Beijing　? 　　　　　　　　　 (不能用come/arrive)　

3.Where is he? He has gone to the 　Beijing　.　

2.I have never been there. Me neither=Neither have 　I.　 我也没有.