Had Not Been vs. Has Not Been

Attribute	Had Not Been	Has Not Been
Tense	Past perfect	Present perfect
Usage	Refers to a past event that had not occurred before another past event	Refers to a past event that has not occurred before the present moment
Verb form	Had + past participle	Has + past participle
Time frame	Past	Present

Definition

Had not been is a verb phrase that indicates a past action or state that did not occur. It is used to talk about something that was not completed or did not happen in the past. For example, "She had not been to the store before." On the other hand, has not been is a verb phrase that indicates a present action or state that has not occurred. It is used to talk about something that is currently not completed or has not happened. For example, "He has not been to the gym this week."

Usage

Had not been is typically used in the past perfect tense to indicate an action that did not happen before a certain point in the past. It is often used in conjunction with another past action to show the sequence of events. For example, "She had not been to the doctor before she got sick." Has not been, on the other hand, is used in the present perfect tense to indicate an action that has not happened up to the present moment. It is often used to talk about recent or ongoing actions. For example, "He has not been feeling well lately."

Duration

Had not been is used to talk about actions or states that did not occur for a specific period of time in the past. It is often used with time expressions such as "for two years" or "since last month." For example, "She had not been to the beach for years." Has not been, on the other hand, is used to talk about actions or states that have not occurred up to the present moment. It is often used with time expressions such as "this week" or "so far." For example, "He has not been sleeping well this week."

Expectations

Had not been is often used to talk about missed opportunities or unrealized potential in the past. It can convey a sense of regret or disappointment about something that did not happen. For example, "I had not been aware of the deadline, so I missed the opportunity." Has not been, on the other hand, is used to talk about current situations or conditions that are not as expected or desired. It can convey a sense of surprise or concern about something that has not happened. For example, "He has not been performing well in his new role."

Comparison

In summary, had not been is used to talk about past actions or states that did not occur, while has not been is used to talk about present actions or states that have not occurred. Had not been is typically used in the past perfect tense to indicate actions that did not happen before a certain point in the past, while has not been is used in the present perfect tense to indicate actions that have not happened up to the present moment. Had not been is often used with time expressions to indicate a specific duration in the past, while has not been is often used with time expressions to indicate a current situation or condition. Had not been is often used to convey regret or disappointment about missed opportunities in the past, while has not been is often used to convey surprise or concern about unexpected situations in the present.