Passé Composé Vs. Imparfait

Question 1

What is a perfective aspect?

Answer 1

A completed action

e.g. she walked her dog

Question 2

What is an imperfective aspect?

Answer 2

An incomplete action

e.g. she was walking her dog

Question 3

What do the perfect tense and past historic have in common?

Answer 3

Both are used to describe an action which is completed or where the starting/finishing point are explicitly situated in time.
Perfective aspect.

Question 4

When is the perfect tense used?

Answer 4

To explain a punctual fact.
To describe a one-off event in the past.
To describe a completed action in the past.
To describe an event/action that took place in a limited or exact period.

Question 5

When is the imperfect tense used?

Answer 5

To describe an action in the past with no precise time, date or duration.
To describe a habit in the past.
To describe an incomplete or ongoing action in the past (what was going on the the background).