What mustn’t you do when you’re on your phone? What should you avoid? What must you try doing?
There’s an etiquette for phone use, and as nowadays we’re using our phones for more and more things, it’s becoming even more necessary to have good phone manners. A good way to talk about reccomendations, prohibition and obligation is with the modal verbs must, mustn’t, should, ought to and the verbs have to, don’t have to.
Here’s a gallery of what bad phone uses are, but I would like you to write on the comments sections about your own ideas.