Auxiliary verbs are also known as helping verbs, because they help form compound conjugations. The key thing to remember about compound conjugations is that it's the auxiliary verb which conjugates for the required tense or mood; the main verb is always a past participle.
French conditional conjugations are, along with the future, the easiest in the entire language.
The conditional perfect is a compound verb form, which means its conjugation has two components: the auxiliary verb in the conditional plus the past participle of the main verb.
The second form of the conditional perfect is the literary equivalent of the conditional perfect.
In the present tense, the irregular -ir verbs devoir, pouvoir, and vouloir are conjugated according to a similar pattern:
In the present tense, the irregular -re verbs dire (to say, tell), écrire (to write), and lire (to lire) are conjugated mostly according to the same pattern.
In the present tense, the irregular -ir verbs ormir (to sleep), partir (to leave), and sortir (to go out) are conjugated according to the same pattern.
Like all compound verb forms, future perfect conjugations have two components.
French future conjugations are, along with the conditional, the easiest in the entire language.
French imperative conjugations are relatively easy, as for most verbs they're identical to their present tense conjugations (without the subject pronoun). In addition, the imperative exists only for three grammatical persons instead of the normal six!
The French imperfect is very easy to conjugate. With a single exception, every single French verb is conjugated according to a single pattern.
The imperfect subjunctive is a literary verb form, meaning that it's reserved for formal, written French - mainly literature, but also history and journalism.
Technically, there is only one irregular -er verb, aller. But there are three patterns in the conjugation of so-called regular -er verbs that set them apart from the rest.
There are around 50 irregular -ir verbs, but that doesn't mean you have to memorize 50 different verb conjugation tables. Thanks to patterns in the conjugations of most of these verbs, you only need to learn 16.
Even though there are more than 100 irregular -re verbs, you don't have to learn a hundred conjugation tables. Since many of these verbs follow certain patterns, you only need to memorize 20.