What is the present perfect tense used for?

The present perfect tense is used to express actions that were completed in the past but have relevance or a connection to the present moment. This tense is formed using "has" or "have" followed by the past participle of the verb. For instance, saying "I have finished my homework" indicates that the action of finishing the homework was completed in the past, yet it is still relevant now because the homework is done and the speaker is available for other activities.

This tense is particularly effective in conveying experiences, changes over time, or situations that may have begun in the past and continue to the present. It allows the speaker to provide context or significance to past actions that influence the current state or situation.