Perfect tense and their description

The perfect tense is a verb form that indicates the action has been completed at the present moment or some point in the past. It is formed by using the auxiliary verb "have" or "has" followed by the past participle of the main verb.

For example:
- I have finished my homework.
- She has already eaten dinner.

The perfect tense can also be used to convey a sense of continuity or ongoing action.

For example:
- I have been studying for hours.
- They have been living in the same house for 10 years.

Overall, the perfect tense is used to express actions that have been completed or have a connection to the present moment.