尽最大的努力的英文：
knock herself out ;knock himself out ;knock myself out ;knock ourselves out ;knock themselves out ;knock yourself out ;knock yourselves out

参考例句：

No matter what the matter may be, we should do our best.
不论事情会成什么样，我们都应当尽最大的努力。

No one expects you to be perfect, but we do expect you to do your best always.
没人指望你完美无暇，但是我们盼望你永远尽最大的努力。

We'll have to is on our mettle to win the game.
要在这场比赛中获胜,我们得准备尽最大的努力。

We'll have to be on our mettle to win the game.
要在这场比赛中获胜，我们得准备尽最大的努力。

knock是什么意思：
n. 爆震声；敲；敲打
v. 敲；打；击；批评；撞；（心）怦怦跳

Who is knocking the door || Who is knocking || Who is at the door || Who is knocking at the door?
谁在敲门

Who is knocking the door / Who is knocking / Who is at the door / Who is knocking at the door?
谁在敲门

Please knock double knocks at the door before entering.
请先敲两下门再进来。

herself是什么意思：
pron. 她自己，她亲自，她本人

She laughed herself helpless.
她笑得不能停止。

She struggled to free herself.
她挣扎着以求脱身。

She has attached herself to the company.
她已加入那个公司了。

out是什么意思：
adv. 出外；在外；离岸；出现；问世；大声地；完全；用完；不流行
adj. 外侧的；偏僻的
prep. 通过…而出；沿着…而去
n. 借口，托辞
pref. 外，超过，出，向外

be out for the count
拳击者被击倒后经裁判数到十秒还站不起来|被判失败|打输|被打败

Out of the Blue
从天上掉下来

Out of power, he is out of favour.
当他失去权力之后，他也就不再受人欢迎。