how do actors pretend to be dead where they have to be a corpese

Actors usually make themselves look dead by staying extremely still, controlling their breathing, and avoiding visible movement like blinking, swallowing, or chest rise. On film, directors also help by using short takes, editing, makeup, and sometimes props or body doubles so the shot looks convincing.

How they do it

• They relax the face and jaw so the body looks limp and lifeless.

• They breathe very shallowly or hold their breath for brief takes.

• They keep their eyes fixed or closed without fluttering.

• The camera usually cuts away before the actor has to stay motionless for too long.

Movie tricks

• Makeup and fake blood sell the effect.

• Editing can remove tiny movements or stitch together the best parts of several takes.

• For longer shots, productions may use a dummy, prosthetic body, or CGI help.

Stage vs. screen

Stage actors often need to hold the pose longer, so stillness and controlled breathing matter even more. Film is easier because the camera can hide movement with cuts, framing, and post-production.

Small note

The term corpsing in acting usually means breaking character, often by laughing, not playing a corpse.

TL;DR: it is mostly stillness, shallow breathing, good makeup, and clever camera work.