In English, there are only two verbs that are irregular in the present tense:
to be (am/are/is/are/are/are)
to have (have/have/*has*/have/have/have)
The modal verbs follow a different pattern than regular verbs but are not technically "irregular":
will
shall
must
etc.
Except for the Modal Verbs, all irregular verbs form the Present Simple Tense in the same manner as the regular ones.
There are relatively few verbs in English which are irregular in the present tense. But like most languages the stalwarts to be and to have are both very irregular: I have, you have, he has, we have, you have, they have. (A regular verb would offer he haves). I am, you are, he is, we are, you are, they are. (I be, you be, he bes, we be, you be, they be).
There is no simple "trick" to forming the past tense of these verbs. Unlike regular verbs, the past tense of irregular verbs do not end in -ed. You must learn the list of irregular verbs and their respective past tenses.
The simple past tense for irregular verbs does not follow a specific pattern like regular verbs do. Common irregular verbs like "go" (went), "eat" (ate), and "come" (came) have unique past tense forms that need to be memorized.
No, irregular verbs do not form their past tense by ending with -d or -ed. Irregular verbs have unique past tense forms that do not follow regular patterns. Some examples include "go" (went), "eat" (ate), and "come" (came).
To form the past tense in English, add "-ed" to regular verbs (e.g. walk → walked) or use irregular forms (e.g. go → went). For the present tense, use the base form of the verb (e.g. walk). Remember that there are irregular verbs and some patterns to follow for forming verb tenses.
The word are is the plural present tense of the verb to be. This is among the most irregular of the English language's irregular verbs. I am, he is, they are, we are, in the present; in the past it becomes I was, he was, they were, we were. In the future, I am going to be.
The present tense for "to be" is "am," "is," or "are," depending on the subject: I am, you are, he/she/it is, we are, they are.
The words "irregular" and "regular" are not verbs and do not have past tense forms.
Examples of irregular verbs that have the same present and past tense forms are "hit," "cut," and "wet."
Be verbs, present tense be verbs. I am He is/she is/it is
Verbs that change their spelling to form the past tense are irregular verbs. Examples include "go" changing to "went," "eat" changing to "ate," and "see" changing to "saw."