se, qualora, laddove, casomai, semmai, in caso, purché, a patto che, sempre che
We have already discussed the concessive conjunctions (although, nevertheless, etc.). The concessive conjunction shouldn't be confused with the conditional conjunctions. The concessive conjunctions are used if the action / event of the concessive clause can impede the action / event of the main clause but doesn't actually do it (Although he has no money, he bought a car.) We use the conditional conjunctions if the realisation of the action / event in the main clause depends on the realisation of the action / event in the conditional clause. Although not really the same thing, if we simplify a bit we can say that the conditional clause is something very similar to the if clause.
As in the case of the if clause we have three different types.
se = if
Se viene, glielo chiedo.
If he comes, I ask him.
Se venisse, glielo chiederei.
I he came, I would ask him.
Se fosse venuto, glielo avrei chiesto.
If he had come, I would have ask him.
In the following pages we will see that these kind of if clauses can be formed as well with conditional conjunctions.