v to do sth的短语
pretend to do sth. 伪装做某事；
hope to do sth. 希望做某事；
offer to do sth. 自动提出做某事；
plan to do sth. 方案做某事；
fail to do sth. 未能做某事
But experts say most schools fail to do so.
但是，专家称大多数的学校都没有做到。
However, this sacrifice would fail to do the trick.
然而，这种牺牲将达不到目的。
I think the new couple plan to do this on purpose.