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sure · adjective /ʃʊr/Full view
sure
A2 never before noun certain
Dictionary examples:

"What's wrong with him?" "I'm not sure."

I'm sure (that) I left my keys on the table.

I’m not sure where they live.

Ben isn't sure whether/if he'll be able to come to the party or not.

Are you sure about that?

She’s sure to win.

Learner example:

I think it's in your room but I'm not sure. (Key English Test; A2; Portuguese)

make sure (that)
A2 to take action so that you are certain that something happens, is true, etc.
Dictionary example:

Make sure that the door is locked.

Learner example:

So please make sure that you we[ar] old clothes. (Key English Test; A2; Albanian)

for sure
B1 without any doubt
Dictionary examples:

I think he's Canadian but I don't know for sure.

One thing's for sure - once the baby's born, your lives will never be the same again.

Learner example:

For sure, you'll love Brazil. (Preliminary English Test; B1; Portuguese)

be sure of yourself
B2 to be confident of your own abilities, qualities, etc.
Dictionary example:

She seems a bit more sure of herself since she got a job.

Learner example:

He is a tall, dark man who walks with confidence and is sure of himself because of his success [i]n the world of business. (First Certificate in English; B2; Greek)

be sure of sth
B2 to be confident that something is true
Dictionary example:

He'll win this year, I'm sure of it.

Learner example:

I think that I [would be a] really useful person for your company. I'm sure of it. (First Certificate in English; B2; Japanese)

a sure thing
C1 something that is certain to happen
Dictionary example:

Your promotion is a sure thing – you’re the best person for the job.

Learner example:

Although I never knew at which time [it] would be, the only sure thing I had in mind was the need to come back home, into your arms! (Certificate of Proficiency in English; C2; Portuguese)

be sure to do sth
C1 If you are sure to do something, it is certain that you will do it.
Dictionary example:

He's sure to go back there again.

Learner example:

What she does not know is that her ex-husband has a very serious type of cancer and is sure to pass away in a few months (that is why he agrees to spend his summer with his son, knowing it would be the last). (Certificate in Advanced English; C1; Greek)

sure enough
C2 as expected
Dictionary example:

He said the book was on his desk, and sure enough, there it was.

Learner example:

And sure enough, these challenging problems come unsolicited most of the time. (Certificate of Proficiency in English; C2; Hungarian)

sure · adverb /ʃʊr/
sure
A2 used to show agreement
Dictionary examples:

"Can I take this pen?" "Sure."

"Do you want to come swimming with us?" "Sure."

Learner example:

Sure! I want to go with you. (Key English Test; A2; Portuguese)

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