please direct me to a lesson on how/when to use passé composé with imparfait in a sentence
You might find the following lesson relevant to your query -
Using Le Passé Composé on its own or with L'Imparfait
It also includes links to other related lessons.
Bonne continuation !
If you were to use the search facility (little magnifier glass top right of the Forum page) you will be able to search for such a lesson.
In the meantime you might find this link helpful:-
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