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The imperfect past tense is used when:-speaking of an event in the past that has happened repeatedly (eg: tous les jours j'allais à l'école)-describing a person, object or event in the past (eg: il avait ...

You should make the past participle agree with its subject in the following cases:
1) It is a past participle of an ordinary verb conjugated with ETRE E.g. je suis all...

The pluperfect tense is used when talking about events and actions that happened back in the past before a later time in the past where something else happened. It is the english equivalent of e.g. I had ...

def withoutIndex (lst, i): return lst[ : i] + lst[i + 1 : ]def printSublists(lst): print(lst) for i in range(len(lst)): printSublists(withoutIndex(lst, i))printSublists([1, 2, 3])

1/y² dy/dx = sec²(x)∫ 1/y² dy/dx dx = ∫ sec²(x) dx-1/y + C₁ = tan(x) + C₂y = -1/(tan(x) + A) where A = C₂ - C₁y(0) = -1/A so y(0) = 1 means A = -1. Finished!