✔ 最佳答案
1.The old people can use an umberlla to be a walking stick.
2.The old people can be using waliking stick to be an unberlla.
3.By a walking stick, can be as umberlla to be a walking stick for the old people.
4.The old people can be use the umberlla as the walking stikck for walk.
4 sent., if you want more , can e-mail to me.