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A: How long have you had it?
B: I’ve had it for/since…
Grammar Focus How long have you had that bike over there? I've had it for three years. How long has his son owned the train and railway set? He's owned it since his fourth birthday. Have you ever played football? Yes, I did when I was little, but I haven't played for a while now.
课堂小结
现在完成时用法（二）
表示从过去已经开始持续到现在的动作或状态，可以和表示“从过去某一时刻延续到现在的一段时间状语”连用，如“for + 时间段”、“since + 过去时间点”、“since + 一段时间 + ago”、“since + 过去时的从句”。且for与since引导的时间状语可以相互转换。
since , for 的用法:
since: 自…...以来
1)since+时间点
He?has?stayed?here?since?5?o’clock.
2)since+ 时间段+ ago
He?has?stayed?here?since?5?hours?ago.
3)since+ 从句(句子要用一般过去时态）
She?has?taught?English?since?he?came?here.
for: (长达）for+ 时间段
He has kept the book for 2 weeks.
since＋一段时间＋ago＝for＋时间段;
since two weeks ago=for two weeks;
I have kept the library book for a week.
= I have kept the library book since a week ago.
在现在完成时态中，for与since引导的时间
状语可以相互转换。
It is + 时间段 +since +一般过去时的句子.
1.他的爷爷已经去世2年了。
2.Nick参军三年了。
3.他离开深圳好长时间了。
4.这本书我已借了4个月了。
It is 2 years since his grandpa died.
It is 3 years since Nick joined the army.
It is a long time since he left Shenzhen.