Has/have + to (To express obligation, necessity, or requirement)

Has to/Have to :

The phrases "has to" and "have to" are used in English to express obligation, necessity, or requirement. They indicate that someone is obligated or required to do something. Here's how they are used:

1. "Has to":

   • "He has to finish his homework before watching TV." (He is obligated or required to complete his homework before watching TV.)
   • "She has to attend the meeting this afternoon." (It is necessary or expected for her to be present at the meeting.)

2. "Have to":

   • "We have to wake up early for work tomorrow." (It is necessary or obligatory for us to wake up early for work.)
   • "They have to pay their bills by the end of the month." (They are required to make the payment for their bills before the month ends.)

In both cases, "has to" is used with the third-person singular subjects (he, she, it), while "have to" is used with all other subjects (I, you, we, they). The phrase "have to" remains the same regardless of the subject.

These phrases convey a sense of obligation or necessity and indicate that the action mentioned is required or expected to be done.

Had to :

The phrase "had to" is used in English to express a past obligation or necessity. It indicates that someone was required or obligated to do something in the past. Here's how it is used:

1. "Had to":
   • "I had to finish my assignment last night." (I was obligated or required to complete my assignment last night.)
   • "She had to take a detour because of the road closure." (She was compelled or forced to take a different route due to the road closure.)

The phrase "had to" is used with all subjects (I, you, he, she, it, we, they) in the past tense. It indicates that the obligation or necessity existed and was fulfilled in the past.

It's important to note that "had to" expresses a specific obligation or necessity in the past, while "have to" is used for present or future obligations.

Will have to :

The phrase "will have to" is used in English to express a future obligation or necessity. It indicates that someone will be required or obligated to do something in the future. Here's how it is used:

1. "Will have to":
   • "I will have to study for my exam tomorrow." (In the future, I will be obligated or required to study for my exam.)
   • "They will have to attend the meeting next week." (In the future, they will be obligated or required to attend the meeting.)

The phrase "will have to" is used with all subjects (I, you, he, she, it, we, they) and indicates a forthcoming obligation or necessity. It suggests that a certain action will be required or expected to be done in the future.

It's worth noting that "will have to" emphasizes the obligation or necessity aspect of the action and implies that there is no choice or alternative. It indicates that the action is inevitable or required.