They have lived here since 1990.
What has happened to the USA in the last 350 years?
注意点一： 现在完成时与一般过去时的用法比较 现在完成时表示过去的动作一直延续到现在甚至会继续下去或表示 过去的动作对现在造成的影响；一般过去时表示动作发生的时间在 过去。现在完成时属于现在时态范围，因此，不能和表示过去的时 间状语连用。 如：yesterday, last night, two weeks ago等 试比较： The plane has arrived . 飞机已经来了。（说明现在的情况：飞机 在这儿） The plane arrived a quarter ago. 飞机是一刻中以前来的。（强 调动作发生的时间在过去） I have taught here for fifteen years. 我在这儿已经教了十五年。 （表示十五年前的动作一直延续到现在，还可能会继续。） I taught here for a year. 我过去在这儿教过一年。（表示“我“现 在已经不在这儿任教了）
((√×))
He has joined the League member for two years. ( ×)
√ He has been a League member for two years. ( )
他已入团两年了。
The man has been dead for several years. The man has died for several years. 这个人已经死了几年了。
练习：用have(has) been 或have(has) gone 填空 A: Where __1__ Li Fei __1__? B: He __2__ to Hainan Island. A: How long __3__ he __3___ there? B: He ___4__ there for three days. A: When will he come back , do you know? B: I’m afraid he won’t come back recently. A: Could you tell me the way to Hainan Island? B: Sorry, I __5__ never __5__ there. A: How many times __6__ Li Fei __6___ to that place? B: He __7__ there only once.
