I don't understand when to use dont or que.
You might start by looking at the two following lessons on those two relative pronouns -
'que' is more straightforward than 'dont' so maybe start with this -
Que = Whom/which/that (French Relative Pronouns)
Dont = Whose (French Relative Pronouns)
As Jim says, this is broad subject to answer in a quick reply but please come back to us with more specific questions and we'll be glad to help.
Bonne Continuation !
In the absence of the kwiziq question or lesson that you are having difficulty with there is no understanding of context.
You might like to consult the online dictionary above or carry out a search using the search box at the start of the Forum page
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