units 4a and 4b revision

Do you know how to use the "be able to" structure?
Can you tell the difference between "must", "have to", "should"?
Check yourself, click on the links below and do the revision exercises.

https://elt.oup.com/student/englishfile/intermediate3/grammar/file04/nef_int_grammar04_a01?cc=pl&selLanguage=pl
https://elt.oup.com/student/englishfile/intermediate3/grammar/file04/nef_int_grammar04_a02?cc=pl&selLanguage=pl
https://elt.oup.com/student/englishfile/intermediate3/grammar/file04/nef_int_grammar04_b03?cc=pl&selLanguage=pl
https://elt.oup.com/student/englishfile/intermediate3/grammar/file04/nef_int_grammar04_b04?cc=pl&selLanguage=pl