What are to be Verbs?

‘To be’ is one of the main linking verbs which is often used with another verb. It has many forms, and it is irregular, and is always changing its form. In the present tense you have, ‘I am’ and ‘He is’ and ‘They are’, while in the past tense you have ‘I was’ and ‘He, she, and they were’.You can find more information here: