Questions & Answers about Jullie lezen mijn boek niet.
Does mijn change its spelling depending on the word that comes after it?
No, mijn (my) is always written the same way when it comes before a noun. Even though boek is a het word (het boek), you would still use mijn for a de word, like mijn krant (my newspaper).
Why do we use lezen here instead of leest?
Lezen is the plural form of the verb. Since the subject is jullie (plural "you", like "you all" or "y'all"), you must use the plural verb form.
Why is niet at the very end of the sentence?
In Dutch, the word niet (not) usually comes after the specific object you are talking about. Because mijn boek is a specific, known object, niet gets pushed behind it to the end of the sentence.
Does jullie lezen mean "you read" or "you are reading"?
It means both! Dutch doesn't have a separate "-ing" tense like English does. Jullie lezen translates perfectly to either "you read" or "you are reading" depending on the context.