The technique to conjugate and ER verb is simple. In majority of the cases (regular ER verbs), this is how we do it:
Example: Manger (To Eat)
Je mange ("r" was removed)
Example: Manger (To Eat)
Je mange ("r" was removed)
Tu manges ("r" was removed and "s" was added)
Il mange ("r" was removed)
Il mange ("r" was removed)
Elle mange ("r" was removed)
Nous mangeons ("r" was removed and "ons" was added)
Vous mangez ("r" was removed and "z" was added)
Ils mangent ("r" was removed and "nt" was added)
Elles mangent ("r" was removed and "nt" was added)
Nous mangeons ("r" was removed and "ons" was added)
Vous mangez ("r" was removed and "z" was added)
Ils mangent ("r" was removed and "nt" was added)
Elles mangent ("r" was removed and "nt" was added)
Similar examples: parler (to speak), donner (to give), detester (to hate), aimer (to like), adorer (to love) etc
There are some exceptions, these exceptions are the irregular ER verbs.
Example: Aller (To Go)
Je vais
Tu vas
Je vais
Tu vas
Il va
Elle va
Nous allons
Vous allez
Ils vont
Elles vont