Complete the frustrated roommate's text message about a terrible singer.

I can literally feel the floorboards ___ every time Kevin tries to hit a high note!

The correct answer is shake.

With verbs of physical perception like feel, we use the bare infinitive (the base verb without "to") to describe a complete, repeated action or fact.

A very common mistake is adding "to" before the verb, but remember: verbs of perception are allergic to the word "to"!