fail to do sth=?

fail to do sth=? fail in sth..fail to do sth.啥意思? fail to do=? fail to do sth与forget to do的区别 fail to do sth和fail in doing sth的区别 forget to do sth和fail to do sth 的区别当fail 也意为忘记,时 pass sth to sb fail to do sth 这两个怎么造句啊?pass sth to sb fail to do sth fail to do与fail (in) sth有什么区别啊 fail的几种用法fail in sthfail in doing sthfail to do sthfail sth fail to do sth是未能做某事?还是失败做某事?有没有fail in doing sth? never fail to do fail to do 关于fail的英语英法知识有哪些请说出关于fail的一些句型,比如：fail to do sth.越多越好,最好举例 fail to do sth解释下.用法什么的,要归纳得好一点. not fail to do sth.是''一定能做某事''的意思吗 wish to do sth.=hope to do sth. use sth to do sth =use sth for doing promise to do sth.=