Bonjour
1- <u>Tous les jours</u> je m'habillais en noir.
2- <u>Hier</u>, je suis allé au stade.
3- Il faisait froid au Canada <u>en janvier</u>.
4- Nous avons eu faim <u>le soir </u>après le ski.
5- <u>Quand tu étais petit</u>, le matin tu allais à l'école et après tu voyais un film.
6- Ils étudiaient le français <u>l'année dernière.</u>
7-<u> Je mangeais</u> quand tu as téléphoné.
8- Vous aviez cinq chiens<u> en 2002.</u>
9-<u> Le premier jour</u>, nous avons visité le Louvre.
10- Il était minuit <u>quand ils sont rentrés.</u>
I'd like to explain but as a French guy, I just can't !!!!!
all I can say for sur is for n°7 and 8 = i'ts exactly as your preterit be + -ing (progressive) + preterit simple.
1- every day = repeted, habitual actions
2- hier = yesterday = near past
3- en janvier = it is <em>always </em>cold in Canada, it's something usual so -- imparfait . <em>(if the sentence had been = </em>il -- en août = so it would have been = il<u> a fait froid</u> au Canada en août ..<em> because it's unsual)</em>
4- near past
5- when you were .. --> it's in the past and over
6- l'année dernière = last year = past ==> it's over
7- je <em>mangeais </em>quand tu <u>as téléphoné </u> = same as in English.. you were doing something, when it happened
8- en 2002 == again, it was a long time ago, it's over, no relation with today
9- le premier jour = it has a connection with the present..--> passé composé
10- ...quand ils sont rentrés = as in English; you use both tenses
did my best to try to explain, knowing that sometimes, we (when talking every day, we don't sometimes respect our grammar rules !!!!!) . But I tried to follow our french rules !!!!!