Verb conjugation refers to how a verb changes to show a different person, tense, number or mood.
To be verb conjugation
In English, we have six different persons: first person singular (I), second person singular (you), third person singular (he/she/it/one), first person plural (we), second person plural (you), and third person plural (they). We must conjugate a verb for each person. The verb to be is a particularly notable verb for conjugation because it’s irregular.
Conjugation of the irregular verb to be:
| First Person Singular | Second Person Singular | Third Person Singular | 
| I am | you are | he/she/it is | 
| First Person Plural | Second Person Plural | Third Person Plural | 
| we are | you are | they are | 
Verb tense conjugation
Verbs are also conjugated according to their tenses. Verb tense indicates when the action in a sentence is happening (e.g., in the present, future, or past). Regular verbs follow a standard pattern when conjugated according to tense. Look at the examples below:
Conjugation of the regular verb to live (based on tense):
| Simple Present | Simple Past | Simple Future | 
| live | lived | will live | 
| Present Continuous | Past Continuous | Future Continuous | 
| am living | was living | will be living | 
| Present Perfect | Past Perfect | Future Perfect | 
| have lived | had lived | will have lived | 
| Present Perfect Continuous | Past Perfect Continuous | Future Perfect Continuous | 
| have been living | had been living | will have been living | 
Conjugation of the regular verb to work (based on tense):
| Simple Present | Simple Past | Simple Future | 
| work | worked | will work | 
| Present Continuous | Past Continuous | Future Continuous | 
| am working | was working | will be working | 
| Present Perfect | Past Perfect | Future Perfect | 
| have worked | had worked | will have worked | 
| Present Perfect Continuous | Past Perfect Continuous | Future Perfect Continuous | 
| have been working | had been working | will have been working | 
Irregular verbs do not follow a standard pattern when conjugated according to verb tense. The following example illustrates this point:
Conjugation of the irregular verb to drink (based on tense):
| Simple Present | Simple Past | Simple Future | 
| eat | ate | will eat | 
| Present Continuous | Past Continuous | Future Continuous | 
| am eating | was eating | will be eating | 
| Present Perfect | Past Perfect | Future Perfect | 
| have eaten | had eaten | will have eaten | 
| Present Perfect Continuous | Past Perfect Continuous | Future Perfect Continuous | 
| have been eating | had been eating | will have been eating | 
| Simple Present | Simple Past | Simple Future | 
| drink | drank | will drink | 
| Present Continuous | Past Continuous | Future Continuous | 
| am drinking | was drinking | will be drinking | 
| Present Perfect | Past Perfect | Future Perfect | 
| have drunk | had drunk | will have drunk | 
| Present Perfect Continuous | Past Perfect Continuous | Future Perfect Continuous | 
| have been drinking | had been drinking | will have been drinking | 






