I'd really like to pick up Grandpa at the railroad station.
我真想去火车站接爷爷。
What would you have done last night if you hadn't had to study?
如果昨晚你不必学习你会做什么?
Do you remember one afternoon ten years ago when I came to your house and borrowed a necklace of yours? Pierre, my husband, was working in a government office. We'd been invited to a ball at the palace so I needed to borrow some jewellery.