1. When I was walking down the street, I slipped on a banana peel and fell on the ground. Thankfully I was alright.2. When I in school I tripped on the stairs and fell on the staircase.
 slip on something trip on somethingslip 比較有滑跤的感覺，用在被香蕉皮滑倒很貼切，而 trip 指碰到東西而跌跤。通常後面會加 fall 表示倒下的動作。
Being able to speak at the age of one, the boy has unlimited poential when he grows up.