French Conjunctions and Connectors: Definitions and Usage

Mais

But (links opposing ideas)

Ou

Or (links choices)

Et

And (links similar ideas)

Donc

So / Therefore (indicates a result)

Or

Now / Yet (links a new fact that changes the situation)

Ni

Neither / Nor (used in negative lists)

Car

Because / For (more formal than 'parce que')

Parce que

Because (the most common way to give a reason)

Comme

As / Since (often used at the start of a sentence)

Puisque

Since / Seeing as (reason is already known)

Vu que

Seeing as / Given that (informal reason)

Quand

When (time)

Lorsque

When / As soon as (slightly more formal than 'quand')

Pendant que

While / During the time that

Depuis que

Since (time-related)

Si

If (condition)

Si jamais

If ever (hypothetical condition)

À moins que

Unless (requires 'ne' and subjunctive)

De peur que

Out of fear that

Quoique

Although / Even though

Même si

Even if

Que

That (essential link for thoughts and verbs)