The て-form is the Swiss army knife of Japanese grammar. With it you can request (〜てください), describe ongoing actions (〜ている), give permission (〜てもいい), and forbid (〜てはいけません).
Dialogue会話
In the classroom — test day.
Tap a line to hear it. Shadow mode leaves a gap after each line — repeat it aloud, then hear it again. Don’t worry about being perfect; worry about being out loud.