MIGHT, MUST, CAN'T

MIGHT, MUST AND CAN'T

MIGHT: We use might to talk about possibilities, things that are probable. 50% YES, 50% NOT
MUST: We use must to talk about things that we are pretty sure about, that we normally have evidences that they are true. DEFINITELY YES
CAN'T: We use can't to talk about things that we are sure they are not true, we have evidences that they are false. DEFINITELY NOT

1. http://www.tinyteflteacher.co.uk/learning-english/grammar/exercises/modal-verbs-deduction.html
2. http://speakspeak.com/english-grammar-exercises/intermediate/intermediate-grammar-exercise-modal-verbs-for-present-probability-must-cant-could-may-might
3. https://elt.oup.com/student/englishfile/intermediate/a_grammar/file03/nef_int_grammar03_b02?cc=us&selLanguage=en
4. http://www.englishexercises.org/makeagame/viewgame.asp?id=3919
5. http://www.englishexercises.org/makeagame/viewgame.asp?id=7521