can you understand the question?he asked boy the question last time
=>  Can you understand the question which he asked you last time
 the man is an architect. WE play with his son every day.
=.> The man whose son we play with every day is an architect.
 the city was very beautiful. we spent our vacation on that city
=> The city where we spent our vacation was famous for its food
the train brokee down twice on the  wayy . it arrtived two hours late.
=> the train which brokee down twice on the  way arrtived two hours late.