travel的過去式和過去分詞

雙語例句：

Sound travels better in water than in air.

聲音在水中比在空氣中傳播得快。

I've always had a yen to travel around the world.

我一直非常渴望周遊世界。

I go to bed early if I'm travelling the next day.

如果第二天去旅行我就早睡。

Flying is quite the best way to travel.

航空絕對是最佳旅行方式。

When I finished college I went travelling for six months.

我大學畢業後在外旅行了六個月。

We lost our money when the travel company went bust.

旅行社破產，我們的錢都賠了進去。