ドア

How it works

This is a casual request built on just the て (te-form) alone: 閉める(しめる) (close) becomes 閉めて(しめて) (close (request)). Polite speech would add ください (please), but dropping it makes it a quick, familiar “close the door”. The object particle を (object) after ドア (door) is also left out, as it often is between friends.