—Yes, you____. But don't stay out too late.
—Yes, you ____, but first you have to clean your room.
Could I some money you?
——当然可以. 但是你必须明天还给我。
— I borrow your ruler?
—Of course. But you return it to me tomorrow.
—Yes, but I'm not a good swimmer.
—Practise using it as much as you can.