This document provides instruction on using "HAVE TO", "ALLOWED", and "BE ABLE TO" to express the past or future. It gives examples such as "We weren't allowed to start talking" and "We were able to start studying early on Tuesday" to illustrate using these phrases to talk about permission or ability in the past or future. The document was written by Teacher Danitza Lazcano Flores for a 10th grade unit on travel tales for the week of May 12-14.