Question

Select all the words that are part of the prepositional phrase in this sentence.

"Dentists encourage brushing teeth twice daily and flossing at least once."

Answer 1

"at least once" is the phrase

Answer 2

The preposition that is used in the given sentence above is the word "at", so the prepositional phrase is "at least once". Therefore, the words that are part of the prepositional phrase in this sentence are the words least and once. Hope this answers your question. Have a great day!