Make sure means to check that something is true or correct, and also to see that something definitely happens. In the first meaning you check that everything is as it should be. In the second you take responsibility for the result: Make sure you lock the door means “don't forget to lock the door”.
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make sure (that) + clause; make sure you + verb (future meaning, no will); make sure of + noun
- Make sure you have your passport before we leave for the airport.
- I called the hotel to make sure our booking was correct.
- Our team leader makes sure everyone gets feedback within a week.
What changed
First versionMake sure you will turn off the lights when you leave.
RevisionMake sure you turn off the lights when you leave.
The action is still in the future, so will seems logical. But after make sure, a future action is expressed with the present tense: make sure you turn off. The correction removes will.
Do not confuse it with be sure: I'm sure she'll come means you believe she will come, while Make sure she comes means see to it that she comes. In an essay, make sure can be replaced with ensure: Schools should ensure that every child can use a computer.
Your turn
Before signing the contract, she read it twice to make sure ___ every detail.
Show the answer
of — The pattern for being certain about something is make sure of + noun: make sure of every detail. In is not used with make sure.
You are going on holiday and leaving your keys with a neighbour. Ask them to make sure something specific gets done and say which days or times.
Could you make sure the plants are watered on Wednesday and Saturday while I'm away?
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