L'IDÉE À RETENIR
L'anglais pro repose sur trois habitudes : on pour les jours avec at pour les heures, by pour les délais, et des paires fixes comme reply to et responsible for.

01Meetings: when and where
Schedule it fully: a meeting on Monday at 10 a.m. in Room 301 with the team. Days take on, clock times take at, rooms take in, and people take with — four prepositions in one sentence, each doing its own job. Join the call on Zoom or in person; attend takes no preposition at all — attend the meeting, not attend to the meeting.
We have a review on Monday at 10 a.m.
on + day · at + time
We have a review on Monday at 10 a.m.
02Deadlines: by, until, in
Finish it by Friday: the work may land any time before Friday ends. Work until Friday: the effort continues up to that point. Finish it in two days: the duration the task needs. Managers hear three different promises here, so choosing correctly is not grammar decoration — it is the commitment itself.
Please send the slides by Friday.
by + deadline
Please send the slides by Friday.
03Emails: to, attachments, replies
Send the file to her, cc the manager, and mention the details in the attachment — or attached to this email. Reply to his message, forward it to the team, and apologize for the delay. Each verb brings its partner: reply to, respond to, attach to, apologize for. Copy these five into your next real email and they become yours.
I will reply to his message this afternoon.
reply to + message
I will reply to his message this afternoon.
04Owning the work
Responsibility has its own vocabulary: responsible for the budget, in charge of the team, work on the project, focus on quality. Talk about topics with about — a report about sales — or the formal regarding. And never write discuss about or contact with: discuss the plan, contact me directly. These two errors mark non-native writing instantly.
À VOUS
Faites le lien.
Lisez la situation avant de choisir. Le pourquoi compte autant que la réponse.
Pour aller plus loin
Nous créons ces exemples avec l'aide de l'IA. L'usage dépend du contexte ; ces schémas ne couvrent pas tout. Poursuivez avec les références.
Un peu de répétition. Un lien plus fort.
Poursuivez avec des exercices ciblés et la révision des erreurs dans l'appli.
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