Tom 在哪儿?他去书店买书了.
Where is Tom?He has gone to the bookshop to buy books.
我在北京待了5年了.
I have stayed in Beijing for five years.
Jack 去过上海两次了.
Jack has been to Shanghai twice.
Ten years have passed since they got married.
(have-> has)
Jim has gone to Beijing for 2 years.(gone -> been)
What time have the factory opened?(opened-> been open)
I have gone to Chunhua Middle School twice(gone-> been)