We use the past simple to describe an action that started in the past and ended in the past. It could be something that happened twenty years ago or something that happened two minutes ago. It started. It stopped. It’s over.

The past continuous tense, also known as the past progressive tense, refers to a continuing action or state that was happening at some point in the past.

Describe a simple action in the future, make a prediction or give a warning, make a spontaneous decision

This material describes degrees of comparison of adjectives and adverbs, general rules of adding the suffixes "er, est", using "more, most, less, least", and typical constructions expressing comparison.