D:wenkufile42021-922e0d3471-1741-4650-87af-753949faf6e19bf95c62d5998fe710ec3578e6b54499.pdf2021-9-1521:22:03 5现在完成时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:1.Our teacher has just left. 2.We have studied English already.3.I have