写出单词的过去式过去分词现词形式代分词形式
问题描述：
写出单词的过去式过去分词现词形式代分词形式
think,bring ,buy,catch ,grow
答
think-thought-thought-thinking
bring-brought-brought-bringing
buy-bought-bought-buying
catch-caught-caught-catching
grow-grew-grown-growing