fail to do 还是fail to have done?

来源：学生作业帮编辑：作业帮分类：综合作业时间：2024/07/05 14:32:02

fail to do：未能(做)...,没能(做)...
He failed to swim across the river.
fail to have done：过去未能成功做成某事
he failed to have swum across the river,but now he can.

fail to do 还是fail to have done? never fail to do fail to do=? often fail to do fail to fail to do sth=? We do not plan to fail we fail to fail to do和 fail doing有区别没? fail in sth..fail to do sth.啥意思? fail to do sth解释下. miss doing和fail to do 翻译fail to