Questions & Answers about Jeg er meget træt, og derfor går jeg i seng tidligt.
Because træt is the basic singular/common form of the adjective.
In this sentence, jeg means I, so the speaker is one person. After er (am), Danish uses the adjective træt:
- jeg er træt = I am tired
You would use trætte in plural contexts, for example:
- vi er trætte = we are tired
- de er trætte = they are tired
So jeg er meget træt is correct for I am very tired.
Meget is used with adjectives, adverbs, and uncountable ideas, while mange is used with countable plural nouns.
Here, meget modifies the adjective træt:
- meget træt = very tired
Compare:
- meget træt = very tired
- meget kaffe = a lot of coffee
- mange bøger = many books
So in this sentence, meget is correct because it means very.