Does this sentence contain an infinitive pharse?

Thank You

Having risen becaus of the rains, the hikers were unable to cross the river.

_______to cross the river________
This is an infinitive phrase in the sentence... correct?

Yes, "to cross the river" is an infinitive phrase.

=)

To determine if a sentence contains an infinitive phrase, you can follow these steps:

1. Identify the verb: In this sentence, the verb is "were."

2. Look for the word "to" followed by a verb: In this case, the word "to" is followed by the verb "cross."

3. Determine if the phrase is functioning as a noun, adjective, or adverb: In this sentence, the infinitive phrase "to cross the river" is functioning as an adjective, modifying the noun "hikers."

So yes, "to cross the river" is indeed an infinitive phrase in the given sentence.