ainsi

Meaning

Draws the consequence by showing the RESULT obtained, often after a demonstration.

Position and punctuation

at the start of the sentence · a comma after

Example

Les horaires ont été élargis ; ainsi, la salle reste accessible jusqu'à vingt heures.

Opening hours have been extended; thus the room stays open until eight in the evening.

In the DELF

the B2 essay · the C1 synthesis

The trap

Ainsi has TWO uses: consequence ("donc") and illustration ("par exemple"). The sentence decides, and both are expected at B2.