noun - a tense that is used for actions that happened at some point in the past or happened regularly in the past, were generally true etc. Verbs usually have the ending -ED and in questions and negatives we usually use DID / DIDN'T
adjective, technical - impossible to make smaller, simpler, or easier to deal with; not able to be reduced or simplified further
adverb - used to introduce a different way of saying something, often to make it clearer or easier to understand