1. Questions:
https://www.englisch-hilfen.de/en/exercises/questions/mistakes.htm
https://www.englisch-hilfen.de/en/exercises/questions/simple_present.htm
https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-97992.php
https://www.ego4u.com/en/cram-up/grammar/simple-present/form/exercises?04
2. Negatives:
https://www.englishgrammar.org/negatives-exercise/
https://learnenglish.britishcouncil.org/english-grammar/questions-and-negatives
https://www.englisch-hilfen.de/en/exercises/tenses/negation.htm
https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-13236.php