The present conditional or présent du conditionnel in french, is a simple tense. This tense is not formed with an auxiliary.
The conditional endings correspond to those of the imperfect indicative. They too are always regular: -ais, -ais, -ait, -ions, -iez, -aient pronounced /ɛ, ɛ, ɛ, jɔ̃, je, ɛ/.
The conditional stem is always the same as the future stem: Je finirais, tu parlerais, elle sortirait, nous travaillerions, vous rougiriez, ils partiraient. Consequently, if the future stem is irregular, so will the conditional be, and vice versa. Moreover, if the future does not exist (defective verbs) neither will the conditional.
Sometimes the past imperfect subjunctive is used to replace the present conditional. This form is called the present conditional second form (Conditionnel présent deuxième forme). In contrast the regular conditional is then called present conditional first form (Conditionnel présent première forme). This has become very unusual, only in sentences starting with Même si and the expression fût-ce is still used.
Present conditional endings
The present conditional endings correspond to those of the imperfect indicative. They too are always regular: -ais, -ais, -ait, -ions, -iez, -aient pronounced /ɛ, ɛ, ɛ, jɔ̃, je, ɛ/.
Here are the complete endings in present conditional for the three groups :
