This document provides examples of polite sentences students can use when interacting with teachers online during the lockdown period. It emphasizes showing respect to teachers, who are working hard to design online courses without fixed hours. As students adjust to online learning, they may make mistakes in communication due to confusion. The document then lists 20 examples of respectful ways for students to address teachers on platforms like WhatsApp, Zoom, and Google Meet when asking questions, submitting assignments, apologizing for delays or technical issues, and requesting help.