Certainly vs Definitely vs No doubt about it vs Undoubtedly

Quand utiliser chacun en anglais, avec le sens, le registre et des exemples.

Certainly

Top 1000 (très courant)A2adverb

Definitely

Top 1000 (très courant)A2adverb

No doubt about it

Au-delà de 10 000 (moins courant)

Undoubtedly

FormelTop 5000 (assez courant)C1adverb
Le plus formel: Undoubtedly
 CertainlyDefinitelyNo doubt about itUndoubtedly
Prononciation🇬🇧 /["/ˈsɜːtnli/"]/🇺🇸 /["/ˈsɜːrtnli/"]/🇬🇧 /["/ˈdefɪnətli/"]/🇺🇸 /["/ˈdefɪnətli/"]/🇬🇧 //nəʊ daʊt əˈbaʊt ɪt//🇺🇸 //noʊ daʊt əˈbaʊt ɪt//🇬🇧 //ʌnˈdaʊtɪdli//🇺🇸 //ʌnˈdaʊtədli//
SensDefinitely; for sure.For sure, without a doubtIt is certain.Definitely; without a doubt.
ExempleWithout treatment, she will **almost certainly** die.I definitely remember sending the letter.She is, no doubt about it, the best candidate for the job.She is undoubtedly the best candidate for the position.
RegistreNeutreNeutreNeutreFormel
FréquenceTop 1000 (très courant)Top 1000 (très courant)Au-delà de 10 000 (moins courant)Top 5000 (assez courant)
Niveau CEFRA2A2-C1
Nature grammaticaleadverbadverbadverb
Collocationscertainly agree, certainly possible, certainly not, certainly true, certainly yesdefinitely agree, definitely believe, definitely knowhave no doubt about it, leave no doubt about it, there's no doubt about itundoubtedly true, undoubtedly clear, undoubtedly helpful
Antonymesuncertainly, doubtfullydoubtfully, uncertainly-doubtfully, questionably, uncertainly
Erreurs fréquentes'Certainly' is often incorrectly used in place of 'certain' in adjectives., Learners might confuse 'certainly' with 'definitely' without noticing the subtle nuance., Some learners use 'certainly' in inappropriate contexts, such as casual greetings.Often confused with 'defiantly' which means resisting authority., Sometimes spelled incorrectly as 'definately'.Using in overly formal contexts where simpler affirmatives are better., Confusing with phrases like 'no question about it' which can imply more uncertainty., Mispronouncing and rushing, making it sound unclear.Confused with 'undoubtably', which is incorrect., Omitting it when certainty is implied., Using it in informal contexts where 'definitely' is more suitable.
Notes d'usageUse 'certainly' when you want to emphasize affirmation or agreement. It is more formal than 'sure' and works well in professional settings, but might feel too strong in casual conversations.Use 'definitely' to emphasize certainty. It fits well in both spoken and written English. Avoid using it in overly formal contexts where alternatives like 'certainly' might be more suitable.This phrase is often used in informal conversation to express certainty. It's suitable for most contexts but can be avoided in very formal writing.Used to emphasize certainty or strong belief; typically in formal writing or speeches, not common in casual conversation.

Vois-le dans de vrais extraits

No doubt about it

Questions fréquentes : Certainly vs Definitely vs No doubt about it vs Undoubtedly

Quelle est la différence entre Certainly, Definitely, No doubt about it et Undoubtedly ?

Certainly: Definitely; for sure. Definitely: For sure, without a doubt No doubt about it: It is certain. Undoubtedly: Definitely; without a doubt.

Lequel est le plus formel : Certainly, Definitely, No doubt about it et Undoubtedly ?

Undoubtedly est le plus formel de tous.

Lequel est le plus avancé : Certainly, Definitely, No doubt about it et Undoubtedly ?

Undoubtedly est le niveau le plus élevé, à C1, sur l'échelle CEFR.

Peux-tu montrer un exemple de chacun ?

Certainly: Without treatment, she will **almost certainly** die. Definitely: I definitely remember sending the letter. No doubt about it: She is, no doubt about it, the best candidate for the job. Undoubtedly: She is undoubtedly the best candidate for the position.

Puis-je utiliser Certainly, Definitely, No doubt about it et Undoubtedly de façon interchangeable ?

Pas toujours. Certainly, Definitely, No doubt about it et Undoubtedly sont proches et se recoupent parfois, mais elles diffèrent par le registre, la fréquence et l'usage, donc remplacer l'une par l'autre peut changer le sens ou le ton. Regarde les différences ci-dessus avant de substituer.