Explanation:
Verbs are words that demonstrate an action, such as sing, dance, smell, talk, and eat. When combined with linking verbs, such as is, must, will, and has, they form verb phrases. Verb phrases can consist of one to three linking verbs, and action verbs, and sometimes any complements (such as objects or direct objects).
Sentence b) contains one.
" ... to go ... " is the infinitive.
Answer:
I'll open the door
I'll come with you.
I'll cook lunch
That's OK. I'll give you mine.
Don't worry! I'll drive you there.
Explanation:
I'll stands for I will.
It is very powerfull and they all work together as one team