donc

Meaning

Draws the consequence of what came before: it is the word of logical conclusion.

Position and punctuation

within the sentence · no comma

Example

Le dossier était incomplet ; je n'ai donc pas pu valider mon inscription.

The file was incomplete; I was therefore unable to confirm my registration.

In the DELF

the B1 letter · the B2 essay · the B2 oral presentation

The trap

Donc very often comes AFTER the conjugated verb ("je n'ai donc pas pu") rather than first: both are correct, but the second position is the written one.