Present perfect tense and present perfect continuous tense ?

The present perfect tense is used to describe an action that was completed at some point in the past but has relevance to the present. It is formed by using the auxiliary verb "have" or "has" followed by the past participle of the main verb.

Example: I have finished my homework.

The present perfect continuous tense is used to describe an action that started in the past and is still ongoing or has just been completed. It is formed by using the auxiliary verb "have" or "has" followed by "been" and the present participle of the main verb.

Example: I have been studying for three hours.