I know how to put earphones in my ears, thank you very much.

我知道怎么把耳机放进我的耳朵里，非常感谢。

youdao

I know how to sew a button on.

我知道怎么缝上扣子。

《柯林斯英汉双解大词典》

I know how it works in general terms.

我大致知道其中的运作原理。

《牛津词典》

"I'm at home,digging in the dirt, or doing something that is very close to the Earth, because that's where I know how to survive."

VOA: special.2009.06.07

In other words, now I know how to tell how the Helmholtz free energy changes as a function of temperature.

换句话说，我现在知道如何写出亥姆赫兹,自由能作为温度的函数。

麻省理工公开课 - 热力学与动力学课程节选

Sure. So I spent some time over in England, so I know a little bit about how they practice law,

当然。我在英国呆了一阵子，所以我对英国的法律有一些了解，

美国式对比英国式 - SpeakingMax英语口语达人

And I intend to work as hard as I know how to make sure we do.

WHITEHOUSE: Weekly Address: Ending the War in Afghanistan and Rebuilding America | The White House

Now that I know how to manage them, next time will go more quickly.

NPR: Mussels Made Easy

Some changes in your lunch? (Laughter.) Yes, I know how -- right.

WHITEHOUSE: Let's Move Rally in Jackson, Mississippi