1.He paied the book for five yuan.
the book cost him five yuan.
he spent five yuan on the book.
the book take him five yuan.
2.she is an eight year's old girl.
she is an eight-year-old girl.
the girl is eight years old.
3.weiming get good marks in englishover the past three years.
4.i saw your cousin was waiting for the bus.
5.i was having a meeting while the headmaster coming.