1.Tommy asked five dollars to buy some history book.
book->books(some+Ns)
2.The martins were the last arriving at the party.
arriving->to arrive(sau những từ chỉ số thứ tự như the first,the second,the third,...the last,ta dùng to V)
3.A friend of him got married at the age of sixteen.
him->his(đại từ sở hữu)