Extra oefenen met grammar:
Present perfect:
https://www.perfect-english-grammar.com/present-perfect-exercise-1.html
https://www.perfect-english-grammar.com/present-perfect-exercise-4.html
https://www.perfect-english-grammar.com/present-perfect-exercise-5.html
Modal verbs:
https://www.grammarbank.com/must-have-to-exercise.html
https://learnenglishteens.britishcouncil.org/grammar/a1-a2-grammar/have-to-must-and-should-for-obligation-and-advice (uitleg lezen, onderaan staan drie 'balkjes' met opdrachten)
https://test-english.com/grammar-points/b1/can-could-be-able-to/
https://www.englisch-hilfen.de/en/exercises/modals/can.htm
Of de woordjes leren via quizlet / boek:
https://quizlet.com/nl/746171111/hv2-chapter-2-flash-cards/