Be sure to

English grammar (See all)

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Be sure to

Be sure to expresses an action which is almost certain to occur. The present tense therefore gives a future meaning:
Bruno and Horatio are sure to succeed. Bruno and Horatio are almost certainly going to succeed.
The weather is sure to be worse tomorrow. We can be certain that the weather will be worse tomorrow.
It was sure to happen! It was almost certainly going to happen!

Notes:

•  Be sure to has a similar meaning to the auxiliary verb should.
be sure to bring your passport = you should bring your passport

•  In imperative constructions, Be sure to... is a synonym of Make sure to, and has a similar meaning to Don't fail to...:
Make sure to arrive at the meeting on time. Do not be late for the meeting.
Don't fail to pay me back by Thursday. You must pay me back by Thursday.


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