Got to vs Must vs Should

When to use each in English, with meaning, register, and examples.

Got to

Top 2,000 (common)

Must

High-frequency chunk A1

Should

Top 1,000 (very common) A1

	Got to	Must	Should
Pronunciation	🇬🇧 //ɡɒt tə// 🇺🇸 //ɡɑːt tə//	🇬🇧 /["/məst//mʌst/","/ˈmʌsnt/"]/ 🇺🇸 /["/məst//mʌst/","/ˈmʌsnt/"]/	🇬🇧 /["/ʃəd//ʃʊd/","/ˈʃʊdnt/"]/ 🇺🇸 /["/ʃəd//ʃʊd/","/ˈʃʊdnt/"]/
Meaning	Must or should do something	Something that is necessary or very important.	used to tell someone what is the right thing to do
Example	I got to finish my homework before going out.	You must finish your homework before playing outside.	You should study for the exam to do well.
Register	Neutral	Neutral	Neutral
How common	Top 2,000 (common)	High-frequency chunk	Top 1,000 (very common)
CEFR level	-	A1	A1
Collocations	got to go, got to know, got to see, got to do, got to try	must see, must do, must have, must remember	should do, should have, should not, should consider, should remember
Antonyms	-	can, may, might	must not, shall not
Common mistakes	Confused with 'have to' or 'need to'., Omitting 'to' in expressions., Using with incorrect verb forms.	Using 'must' in situations where 'have to' is more suitable., Confusing 'must' with 'might' or 'may', which imply possibility instead of necessity., Using 'must' with the gerund form instead of the base form of the verb.	'Should' is often confused with 'must,' leading to weaker advice than intended., Forget to follow 'should' with the base form of the verb, e.g., saying 'should goes' instead of 'should go.', Using 'should' for past events instead of 'should have.'
Usage notes	Used informally in speech. Suitable for conversations but less common in formal writing. Often implies necessity or obligation.	Use 'must' when giving strong advice or making strong recommendations. Avoid using it in casual conversations where 'should' might be more appropriate.	Use 'should' for advice, suggestions, or expectations. It's appropriate in both spoken and written English, but avoid it in very formal contexts where 'ought to' might be preferred.

See it in real clips

The Lord Of The Rings › The return of the king

But we have the White Wizard. That's got to count for something.

We ain't got to pay no rent.

You failed to kill the lawyer. I've gotta get you off the bench...

The Lord Of The Rings › The return of the king

But we have the White Wizard. That's got to count for something.

We ain't got to pay no rent.

Got to

I must have drank me about 15 Dr Peppers.

A Knight Of The Seven Kingdoms › S1 E1

Must you mock me?

Game Of Thrones › S1 E1

You must be Robb.

I must have drank me about 15 Dr Peppers.

A Knight Of The Seven Kingdoms › S1 E1

Must you mock me?

Must

Frequently asked questions: Got to vs Must vs Should

What's the difference between Got to, Must, and Should?

Got to: Must or should do something Must: Something that is necessary or very important. Should: used to tell someone what is the right thing to do

Can you show an example of each?

Got to: I got to finish my homework before going out. Must: You must finish your homework before playing outside. Should: You should study for the exam to do well.

Can I use Got to, Must, and Should interchangeably?

Not always. Got to, Must, and Should are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.