Forming regular adverbs with -ment

It's very easy to form regular adverbs in French:

lentementslowly

sérieusementseriously

fortementstrongly

rapidementquickly

parfaitementperfectly

franchementfrankly

Here's the rule: 

- Take the feminine form of an adjective :

lent -> lente
franc -> franche
sérieux -> sérieuse  

- Add -ment to the end :

lente -> lentement  
franche -> franchement
sérieuse -> sérieusement

 See also the more advanced lessons about irregular adverbs:

Forming adverbs from adjectives ending in a vowel

Certain adverbs end in -ément

Bien, mal, mieux, moins, peu (irregular adverbs)

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Examples and resources

rapidementquickly
sérieusementseriously
fortementstrongly
lentementslowly
franchementfrankly
parfaitementperfectly
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