know how
fixed phrase.fixed phrase. You use this to say you have the ability or skill to do something. It is almost always followed by 'to' and a verb, like 'I know how to swim'.
fixed phrase. A fixed verbal expression used to state possession of a particular skill or ability. It is typically followed by a to-infinitive clause.
He knows how to cook pasta.
She knows how to fix the printer, so you should ask her for help.
The veteran diplomat knew precisely how to navigate complex negotiations without conceding key principles.
This phrase is almost always followed by 'to' and an action verb.
Contrast with 'can', which also expresses ability but is a modal verb; 'know how to' often implies a learned or more complex skill.
I know to swim.I know how to swim.The word 'how' is necessary between 'know' and the 'to'-infinitive when talking about a skill.