这本杂志你借了多久了英文翻译

I have kept the book for a week.这句话用现在完成时好一些，楼上的是瞬间动词不能表一段时间

故原来的借borrow（短暂性动词）要变成持续性动词（keep）所以就有i have kept the book for two weeks.(我已经借了这本书两周了)如果改为同义，则是i borrowed the book two weeks ago.(我两周前借了这本书）

这个杂志能使我借多久？The magazine I can borrow?3元。3 yuan或者three yuan

You can keep this book as long as you like. 一般是这样表达。有问题可以追问。