ask ur teacher if it’s right. =]

“To fall asleep” is a verb. What’s throwing you off is the fact that most verbs only contain one word besides the word “to.” In this case, the verb has three words.

If you were simply to say, “to fall,” that would be a different verb altogether. And if you were to say, “to asleep,” that wouldn’t make sense.

This verb requires three words and cannot be said any other way.

Nor is “to fall asleep” a prepositional phrase. “To” can be a preposition, such as the title of Virginia Woolf’s book, To the Lighthouse.

But not here. It’s a verb here, a part of the infinitive.

Another way you can play with this sentence to convince yourself that “to fall asleep” is a verb:

After “helps her,” omit what the sentence contains and stick in any old verb that you’re sure is a verb, such as:

helps her move

helps her travel

helps her sing

This almost confirms, in an almost mathematical way, that we’re talking about a verb in this position of the sentence. This evidence isn’t proof, but it does corroborate.