A few examples of ways to complete the sentence with infinitive verbs are;
- Mom and dad are happy to help you with your homework.
- Mom and dad are happy to be here
What are infinitive verbs?
An infinitive verb is a non-finite verb form that tell us more about an action or a state of being without specifying a subject or tense.
some examples of infinitive verbs:
- To walk
- To sing
- To dance
- To eat
- To sleep
If you want to include a complete infintive verb, you would add "to" followed by a verb after the adjective, like "Mom and dad are happy to celebrate"