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1. — How long have you had that bike over there? 那边的那辆自行车你买了多长时间了？
— I’ve had it for three years. 我买了三年了。
2. How long has his son owned the train and railway set? 他的儿子拥有这套轨道火车多长时间了？
He’s owned it since his fourth birthday. 自他四岁生日起，他就拥有了它。
3. ---Have you ever played football? 你曾经踢过足球吗？
---Yes, I did when I was little, but I haven’t played for a while now.
是的，当我很小时就踢过，但是现在我有好长一段时间没有踢了。
【课堂探究】
一、现在完成时的构成及句式转换： 助动词 have/has + 过去分词
1. I have finished my homework. (肯定句)
I have not finished my homework.（否定句）
2. —Have you finished your homework?
—Yes, I have / No, I haven’.
难点：already, yet 在现在完成时中，already 用于肯定句，yet用于否定和疑问句中。
3. 现在完成时的标志：
① 常与just, already, yet, ever, never, before, so far 等连用，
② for + 时间段；since + 过去的时间点
4．Have/has gone to..., 去了...（还没有回）；
Have/has been to..., 去过...（已经回）
例：1) -Where is your sister?
-She has gone to the library.
她去图书馆了。（没有回，还在图书馆）
2) I have been to Beijing many times.
我去过北京很多次了。（我已经回了，没在北京了）；
how long for+时间段，since...不能与瞬间动词连用。
6.练习:
1. He is not at home, he has ______ Jiefangbei.
A. been to B. go to C. gone to D. been in
2. She _____in Chongqing 5 days ago, she has_____ in Chongqing for 5 days
A. arrived, arrived B. been, arrived