for 与of 的辨别方法：
You are nice. (通顺，所以应用of)。
He is hard. (人是困难的，不通，因此应用for。)
句子：The boy in blue has three pens.
提问：1.Who has three pens?
2.Which boy has three pens?
3.What does the boy in blue have?
4.How many pens does the boy in blue have?
句子：He usually goes to the park with his friends at 8:00 on Sunday.
提问：1.Who usually goes to the park with his friends at 8:00 on Sunday?
2.Where does he usually go with his friends at 8:00 on Sunday?
3.What does he usually do with his friends at 8:00 on Sunday?
4.With whom does he usually go to the park at 8:00 on Sunday?
5.What time does he usually go to the park with his friends on Sunday?
6.When does he usually go to the park with his friends?
He is so funny a boy.
Jim has so big a house.
It is such a nice day.
That was such an interesting story.
He is watching TV in the room.
They were dancing at nine o'clock last night.
There is a boy swimming in the river.
We have fun learning English this term.
They had problems getting to the top of the mountain.
Thanks for helping me.
Are you good at playing basketball.