The document summarizes the key uses of various English tenses:
- The Present Simple is used to describe present habits, routines, and facts. The Present Continuous expresses ongoing actions at the moment of speaking. The Present Perfect expresses indefinite past actions that have an effect on the present. 
- The Past Simple talks about completed past actions at specific times. The Past Continuous describes past actions that were ongoing. The Past Perfect emphasizes that one past action occurred before another. 
- The Future Simple makes predictions and promises. The Future Continuous indicates future ongoing actions. The Future Perfect expresses certainty that an action will be completed before a future time. The Future Perfect Continuous describes future ongoing situations for a specified period of time.