err|erred|erring

每个人都会犯错，关键是能从错误中学习。

Everyone will ___err, but the key is to learn from mistakes.

他在填写表格时不小心出错了。

He ___erred when filling out the form by mistake.

即使是最优秀的学生也会犯错。

Even the best students are capable of ___erring.