Imparfait is one of the several tenses used to past actions.  We use the imperfect to describe the emotional or physical states in the past. It doesn't matter at what time these actions began or ended. The imparfait is used to describe people, places, conditions or situations in the past. It would also be used to describe habitual or continuous actions in the past. These past habits are mostly translated into "used to" or "would". The passé composé is used to describe actions that started and ended at a specific time in the past. The imperefct describes past situations, and the passé composé narrates specific events.
        
For imperfect verbs, all the verbs are formed the same way, except for the verb être.           
                               Parler                                Finir                                      Attendre
Present                 nous parlons                    nous finissons                          nous attendons
Stem                          parl-                                 finiss-                                    attend-
                            je parlais                            je finissais                                j' attendais
                            tu parlais                            tu finissais                                tu attendais
                      il/elle/on parlait                    il/elle/on finissait                        il/elle/on attendait
                          nous parlions                    nous finissions                            nous attendions
                          vous parliez                       vous finissiez                              vous attendiez
                      ils/elles parlaient                ils/elles finissaient                         ils/elles attendaient

Forms of Être
j'étais        tu étais        il était        nous étions        vous étiez        ils  étaient

ne jamais - never
ne personne - nobody
ne pas - not
ne rien - nothing
Je n'ai rien fait. - I did nothing

One way to get French accents on to your keyboard is to hold the ALT key and type in a four-digit code. For example - ALT+0192 = À. But remember to use the numbers on the right side of the keyboard instead of the numbers on the top of the keyboard.

Another way is to go into Control Panel and change your keyboard to French Canadian. Then you only have press ` (left of 1) and then the vowel after to get the grave accent. To get the aigu accent, type ' (single quote) and then e. For the cedilla, type ' (single quote) and then c. You can get the circonflexe by typing ^ (shift+6) and then e. You can get the tréma by pressing " and then o.

For the last way, you're going to need Google Chrome. Download it, if you don't have it yet. Get the "Accents Plus" app on your Google Chrome page. Choose French accents. Whenever you need to use an accent, the app will be there on the top right corner - like in the picture on the left, and then you place your cursor over the kind of accent you need and it will show you what keys you need to press to get the accent. Usually, to hold two keys. it's as simple as that.