谁知道以下这些英语单词的过去式?borrow climb enjoy help change decide hope use study try

问题描述:

谁知道以下这些英语单词的过去式?borrow climb enjoy help change decide hope use study try
如果过去式不止有一个,请把全部的过去式写出来!~

borrowed,climbed,enjoyed,helped,changed,decided,hoped,used,studied,tried