The French verb “bouillir” means “to boil.” It is conjugated irregularly in the Present tense. So it must be memorised.

Present tense

• je bous (I boil)
• tu bous
• il bout
• nous bouillons
• vous bouillez
• ils bouillent

It is only the Present tense of bouillir that is irregular. So this is the only part you need to memorise.

Passé composé

• j’ai bouilli
• tu as bouilli
• il a bouilli
• nous avons bouilli
• vous avez bouilli
• ils ont bouilli

In the Passé composé, “bouillir” is conjugated with “avoir,” like most verbs. Its past participle is formed in the same way that all other past participles of regular verbs ending in “-ir” are formed – by removing the “r” at the end. So “bouillir” in the Passé composé is regular.

Future simple

• je bouillirai
• tu bouilliras
• il bouillira
• nous bouillirons
• vous bouillerez
• ils boulliront

The Future simple of bouillir is regular. Its Future simple stem is its infinitive form (bouillir-). So there are no surprises here either.