climb的过去式是什么

　　The plane climbed until it was clear of the clouds.

　　飞机爬升直至穿出了云层。

　　I was starting to puff a little from the climb.

　　爬坡弄得我有点喘息起来。

　　He was burning to go climbing again.

　　他渴望再去爬山。