He used to preche the gospel to the villagers.

She prechews her food before swallowing.

He prechewed the food before giving it to the baby.

She is prechewing her food before swallowing.

I always prechew my baby's food before feeding it to her.

The patient underwent prechemotherapy screening to assess their overall health.

The patient underwent prechemotherapeutic treatment to prepare for the chemotherapy.

The doctor prechecks the patient before the surgery.

I always precheck my luggage before going to the airport.

I am prechecking the documents before the meeting.