Grammar Glow

What is "Must"?

"Must" is a modal verb used to express necessity, obligation, or strong recommendations. It conveys a sense of urgency or importance, indicating that something is essential or required.

Uses of "Must"

1. Expressing Necessity or Obligation

"Must" is often used to convey something that is necessary or required.

Examples

You must wear a seatbelt while driving.

2. Indicating Strong Recommendations

"Must" can also be used to make strong suggestions or recommendations.

Examples

You must try this restaurant; the food is amazing!

3. Making Logical Deductions

"Must" is used to draw conclusions based on evidence or reasoning.

Examples

She must be at work; her car is here.

4. Expressing Prohibition

"Must" can indicate what is not allowed or prohibited.

Examples

You must not smoke in the building

Forming Sentences with Must

1. Affirmative Form

Structure:

Subject + must + base verb

Examples

You must complete your homework before dinner.
She must attend the meeting to discuss the project.
We must respect the rules of the game.

2. Negative Form

Structure:

Subject + must not (mustn’t) + base verb

Examples

You must not use your phone during the exam.
We must not speak loudly in the library.
He mustn’t forget to lock the door when he leaves.

3. Question Form

Structure:

Must + subject + base verb?

Examples

Must they submit their assignments online?
Must she call you before coming over?
Must we wear uniforms to school?

What is "Have to"?

"Have to" is a modal expression used to convey necessity or obligation, similar to "must." It indicates that something is required due to external circumstances or rules rather than personal choice. "Have to" can change form according to the subject (using "has to" for third-person singular), and it is followed by the base form of the main verb.

Uses of "Have to"

1. Expressing Necessity or Obligation

"Have to" indicates that something is necessary, often due to external factors or rules.

Examples

I have to wear a uniform at my job.

2. Indicating External Requirements

"Have to" is used to express obligations imposed by others, such as laws, regulations, or authority figures.

Examples

You have to pay your taxes by April 15th.

3. Making Suggestions

Have to" can also indicate a suggestion or recommendation.

Examples

You have to see that movie; it’s fantastic!

Forming Sentences with "Have to"

1. Affirmative Form

Structure:

Subject + have to + base verb

Examples

I have to go to the doctor tomorrow.
She has to complete her project by Friday.
They have to study for the exam this weekend.

2. Negative Form

Structure:

Subject + do/does not + have to + base verb

Examples

I do not have to work on Saturdays.
You do not have to bring any food to the picnic.
He does not have to pay for the tickets; they are free.

3. Question Form

Structure:

Do/Does + subject + have to + base verb?

Examples

Do/Does + subject + have to + base verb?
Do they have to submit their assignments online?
Does she have to attend the meeting?

Differences Between Must and Have to

1. Must as an Internal Obligation

"Must" is often used to express an obligation that comes from within the speaker. It indicates a personal necessity or a strong recommendation.

Usage:

Personal conviction or belief.

Strong suggestions or recommendations.

Examples

You must see that movie; it’s incredible!
I must finish this book; I really want to know the ending.

2. Have to as an External Obligation

"Have to" is used to express obligations that are imposed by external factors such as rules, regulations, or circumstances. It indicates that something is required due to outside influence rather than personal choice.

Usage:

Legal requirements or rules.

Obligations due to circumstances beyond one’s control.

Examples

You have to wear a helmet when riding a bike.
I have to pay my taxes by April 15th.

What is "Must"?Uses of "Must"Forming Sentences with Must What is "Have to"?Uses of "Have to"Forming Sentences with "Have to"Differences Between Must and Have to