USED TO

GRAMMAR: http://www.perfect-english-grammar.com/used-to.html

EXERCISE 1: http://learnenglishteens.britishcouncil.org/grammar-vocabulary/grammar-videos/used

EXERCISE 2: https://www.englishclub.com/esl-games/grammar/jumbled-past-used-to-1.htm

EXERCISE 3: https://www.eslgamesplus.com/past-continuous-used-to-volley/