Answer:
Multiple utilities and conjugations
Step-by-step explanation:
Uses of the verb have
a) as auxiliary of the compound tenses (to have + participle) of the other verbs
I have written this post. (I have written this post.)
He had been very quiet. (I / he / she had been very quiet.)
He had tried everything. (I / he / she had tried everything.)
b) With the meaning of duty or convenience
I have to prepare for tomorrow. (I have to prepare for tomorrow.)
I will have to settle for what happens. (I will have to settle for what happens.)
We will have to study the case very well. (We have to study / We shall study the case very well.)
Uses of the verb to have
a) with the meaning of possession
I have a big car. (I have a big car.)
I have everything I need. (I have everything I need.)
I will have better opportunities. (I will have better chances.)
b) with the meaning of duty or obligation to have + that + infinitive:
You will have to clean the office. (You will have to clean the office.)
You have to pay attention. (You have to pay attention.)
They have to repeat everything. (They have to repeat everything.)
They have to be useful to the company. (They have to be useful to the company.)
They have to spread the knowledge. (They have to divulge knowledge.)
c) To speak and say the age
They are older than us. (They are older than us.)
He is four years old. (He / she is four years old.)
You are already of age. (He / she is already of legal age.)
He is 80 years old. (He / she is 80 years old.)