And it a showing where or when is.
When a participle phrase is used, it always refers to the subject of the main clause.
The forms of non-finite verbs are — infinitive, gerund, and participle participles become finite verbs when they take auxiliary verbs.
The present perfect is also sometimes used to introduce background information in a paragraph.
It shows that something will happen in the future, so it is a future tense verb.
But I can't decide to write that sentence that I wrote.