这是一套关于《I've had this bike for three years.》的素材，格式为PPTX，文件大小为0.54 MB，页数为35页，请使用101教育PPT软件打开使用；
Unit 10 I've had this bike for three years.
Grammar Focus
Read the following sentences.
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 famous birthday.Have you ever played football?Yes, I did when I was little, but I haven’t played for a while now.
现在完成时表示动作或状态从过去某一时刻开始、一直持续到现在，多与“since +点时间”或“for +段时间”连用。for表示“经过(一段时间)”，而since表示“自从(……以来)”。 常见结构如下：
Summary
现在完成时--- since 和 for 的用法
for +表示一段时间的状语 一段时间+ agosince + 表示过去的某一时间点 从句来看几个例句吧：
He has lived here for 16 years. 他住在这里有十六年了。He has lived here since 16 years ago. 他从十六年前起就住在这里了。
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