How do you use lam to hit hard in a sentence?

You can't use "lam" to hit hard in a sentence. "Lam" is a slang term meaning "to run away quickly," and it doesn't have any connection to hitting.

If you're looking for a word to describe a hard hit, you might use words like:

* Smash: He smashed the ball out of the park.

* Wallop: The boxer walloped his opponent.

* Slam: The door slammed shut.

* Thwack: The wind thwacked the leaves against the window.

It's important to choose the right word based on the context and the type of hit you want to describe.