The subject we will deal with is not new, as we already know what they are irregular verbs. If you have any questions, access the text "classification of verbs” to remember some important elements. But, to give a helping hand, irregular verbs are those that present some alteration in the stem, which is that word that does not change, when they are conjugated. Let's imagine the verb do, for example:
I make
You do
He does
We do
You do
They do
Well, it's simple, we realize that in the first person singular (I), the root that remains in the other verbal people (faz-), was altered by the change of a letter (faç-).
That way, we know what these verbs are, but how about we know how they are conjugated? Well, for that, we chose the verbs “give, bring, know and want”, taking into account all the modes and tenses in which they are conjugated. Let's go to our task then?
Present indicatively

Imperfect past tense

past tense perfect

Past perfect past tense

future of the present

Future of past tense

subjunctive mode
Gift

Imperfect past tense

Future

Imperative mode
Observation: The verb to want is not conjugated in the imperative mood.
affirmative imperative

negative imperative

Nominal forms
Infinitive

Gerund

Participle
