When to use was or were?
As I said above, was and were are in the past tense, but they are used differently. Was is used in the first person singular (I) and the third person singular (he, she, it). Were is used in the second person singular and plural (you, your, yours) and first and third person plural (we, they).
When to use have been or has been?
1 Answer. "Has been" and "have been" are both in the present perfect tense. "Has been" is used in the third-person singular and "have been" is used for first- and second-person singular and all plural uses. The present perfect tense refers to an action that began at some time in the past and is still in progress.