请问这里用什么时态,为什么?How long ____ your aunt _____(keep) this book?

请问这里用什么时态,为什么?How long ____ your aunt _____(keep) this book? How long can I ____ this book? How long I ____(borrow) your book? How long need I keep this book?哪儿错了 How long can I keep this book?是什么意思 How long may i keep the book 什么意思 How long may i keep the book?You ____ keep it for two weeks Could you tell me how long I can keep the book.为什么用I can 请问这里用什么时态,为什么--____you ________(hear) from your uncle recent My father _____(read)this book since yesterday.空上填什么时态?为什么? How long have your uncle and aunt _____? A got married B bee How long —l keep the book.