虽然城市在中文里是主语但在英语中，它应该是个状语 Recently a lot of high-rise buildings have been built in our city.这样说才是正确的英语 It's been more than a week since I borrowed the boo
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.(
This book I have borrowed for three days这本书我已经借了三天了What he didn't leave until the teacher came back什么直到老师回来他才离开
I had borrowed this book two weeks ago
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漫游的Alice
