how do i know if this sentence has a participle or participial phrases "Having deposited our mournful burden upon tressels within this region of horror, we partially turned aside the yet unscrewed coffin, and looked upon the face of the tenant."-Edgar Allen Poe?

When you are looking for participles, you are looking for verb forms that are not serving as verbs for subjects.

http://www.chompchomp.com/terms/participle.htm

In that sentence, I see one participial phrase and one participle without a phrase.

After reading through the linked webpage above, let me know what you think, and I'll give you feedback.

=)

Just remember that participles are verbs that are behaving as adjectives... modifying nouns. So find the nouns and see if they have a describer that LOOKS like a verb.

Examples: The broken window let in the wind. The breaking waves roared along the shore.
I broke my toe when I kicked the rock.

In the sentence provided, "Having deposited our mournful burden upon tressels within this region of horror, we partially turned aside the yet unscrewed coffin, and looked upon the face of the tenant," there is a participial phrase and a participle without a phrase.

The participial phrase is "Having deposited our mournful burden upon tressels within this region of horror."
- The noun being modified is "burden," and the participial phrase describes how the burden was deposited in the previous action.

The participle without a phrase is "unscrewed."
- The participle is modifying the noun "coffin" and describes the state or condition of the coffin.

To identify participial phrases or participles, you can follow these steps:
1. Identify the nouns in the sentence.
2. Look for verb forms (usually ending in -ing or -ed) that are not serving as verbs for the nouns.
3. Determine if these verb forms are modifying the nouns, indicating a participial phrase or participle.

By understanding the function of participles and their relationship to nouns, you can effectively identify them in sentences.