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主语+ have / has + 动词的过去分词
主语+ haven’t / hasn’t + 过去分词
结构：肯定句：
否定句：
表示过去发生或已经完成的某一动作对现在造成的影响或结果。
从过去某一时间开始一直延续到现在的动作或状态。
Have / Has +主语+动词的过去分词 ?
Yes, I have./Yes, she has.
No, I haven’t. /No, she hasn’t.
--- How long have you studied at No. 3 Middle School?
since I came here.
since 2016.
--- I have studied at this school
since 2 years ago.
for 2 years.
I have been in No.3 Middle School for 13 years.
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.
Grammar Focus
I have taught English since 13 years ago.
I have taught English since I left school.
for +
一段时间
since +
(表示过去某一时间的)时间点
从句(一般过去时)