Practising grammar!

Here I am going to give you some websites in which you can practice English online. There are many exercises to check your knowledge. It is recommended to do this after studying. Good luck! :)

- Zero conditional: 

http://www.perfect-english-grammar.com/zero-conditional-exercise-1.html

https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-112834.php


http://www.englishmedialab.com/Quizzes/preintermediate/zero%20conditional.htm

https://www.allthingsgrammar.com/zero-conditional.html

https://www.examenglish.com/grammar/A2_zero_conditional.htm

- MUST and HAVE TO:

https://www.englishclub.com/grammar/verbs-modals-have-to-must-not-quiz.htm

https://agendaweb.org/verbs/modals-must-have-to-exercises.html

http://learnenglishkids.britishcouncil.org/en/grammar-practice/modals-must-and-mustnt

https://www.eslgamesplus.com/must-cant-modal-moonshot/

https://www.englisch-hilfen.de/en/exercises/modals/must_not.htm