There are some endings that are typically masculine such as –on, but if you find it coming after a letter s or the letter c, it will often be feminine. Nouns that end in consonants like t, x, d, l, f, m or s, etc. tend to all be masculine words.
It is one of the exceptions of the french verbs so u need to learn it by heart! Here you go:
Imparfait would be the description of a situation for example :weather, landscape, person in the past whilst passé composé are actions that suddenly happened for example, interrupting another action. Passé composé you would also use an auxiliary like either avoir or être then you would add the verb
Translation, you wasted your time at translating this.