How do you use have been in a sentence?

How do you use have been in a sentence?

Has been and have been are both used with the present perfect tense, which is used when we want to talk about something that started in the past but (1) is still going on right now in the present OR (2) is still relevant / true today.

How do you use being and been in a sentence?

The PAST PERFECT TENSE indicates that an action was completed (finished or "perfected") at some point in the past before something else happened. This tense is formed with the past tense form of "to have" (HAD) plus the past participle of the verb (which can be either regular or irregular in form):

Is it has been completed or have been completed?

The work has been completed or the work is completed-which is the correct form. As far as I am concerned when you mention a particular time second one is correct and there is no time mentioned first one is correct. Both are 'correct'. The first indicates the finished action; the second indicates the present condition.