les conjonctions de subordination

Subordinating conjunctions introduce subordinate, or dependent, clauses. The most commonly used are que (that), pendant que (as, while), quand / lorsque (when), depuis que (since, indicating time), tandis que (while, whereas) puisque (since), parce que (because).

Some of these conjunctions may occur with other tenses besides the present, including the future, conditional, and imperfect. There are other conjunctions which require the subjunctive.