The perfect tense is used to talk about something that happened in the past. It's an action that is completely finished. Some verbs take être to form the perfect tense.
You need to consider three things to form the perfect tense with être:
When you form the perfect tense with être, the past participle agrees with the subject of the verb (the person doing the action).
If the subject pronoun is feminine and singular, you need to add -e to the past participle of the main verb → allée.
If the subject pronoun is masculine plural, add -s to the past participle of the main verb → allés.
If the subject pronoun is feminine plural, add -es to the past participle of the main verb → allées.
So the perfect tense of aller (to go) is:
To sum up, you must choose the correct part of être, add the past participle and add the correct agreement, for example:
A limited number of verbs take être. Here is the list of the verbs used with être in the perfect tense. Try to memorise them as the MR R VANS TRAMPED verbs:
|Monter||to go up||monté|
|Naître||to be born||né|
|Sortir||to go out||sorti|
|Rentrer||to go back in||rentré|
|Descendre||to go down/to get off||descendu|