Look at these uses of en:
En as a pronoun can replace a noun when given a quantity of it = I bought twenty of them / I have three of them...
Note the order is as such:
Simple tense : en + [verb] + [number]
Close Future : aller + en + [infinitive] + [number]
Compound tense : en + [auxiliary] + [past participle] + [number]
This also applies to un / une (one):
as well as un autre / une autre (another one):
See also En can replace de + phrase (adverbial pronoun)
and Replacing nouns with le, la, l', les = it, him, her, them (direct object pronouns)
Want to make sure your French sounds confident? We’ll map your knowledge and give you free lessons to focus on your gaps and mistakes. Start your Braimap today »
Learn more about these related French grammar topics
Examples and resources
Tu as aimé ta glace ? - Oui, j'en veux une autre !Did you enjoy your ice cream? - Yes, I want another one!
Tu achètes un pantalon ? - Oui, j'en achète un.Are you buying (a pair of) trousers? -Yes, I'm buying one.
Vous voulez une boîte de chocolats ? - Oui, je vais en prendre une.Do you want a box of chocolates? - Yes, I'm going to take one.