现在完成时中，能不能与for或since连用？还有for since能与延续性动词连用吗？延续性动

Question

现在完成时中，能不能与for或since连用？还有for since能与延续性动词连用吗？延续性动词能在现在完成时中用吗？请回答这三个问题

Answer 1

现在完成时中可以用for, since，而且很常用：

I have studied English since 3 years ago.

       I have studied English for 3 years.

  2. for, since可以与延续性动词连用：

     I have kept the book for 4 days.

     I have kept the book since 4 days ago.

3. 延续性动词能再现在完成时用，就比如

    I have kept the book since 4 days ago.

追问

我问错了，应该是终止性动词

Answer 2

for 表原因 since 时间连词，组合起来是“为了自从”追问

请看清题再回答好吗