Past tense
PAST SIMPLE X CONTINUOUS
elt.oup.com/student/project3rdedition/level4/unit1/grammar/exercise1?cc=cz&selLanguage=cs
USED TO
elt.oup.com/student/project3rdedition/level4/unit1/grammar/exercise2?cc=cz&selLanguage=cs
PAST SIMPLE X CONTINUOUS, USED TO
elt.oup.com/student/project3rdedition/level4/unit1/grammar/exercise3?cc=cz&selLanguage=cs