It's blue. I am certain that it is blue. It's a fact.
It could be blue. (present) I'm not certain that it is blue.
The storm will get worse. I'm certain that the storm will get worse.
The storm could get worse. (future) I'm not certain that the storm will get worse.
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Could future possibility examples sentences?
We use could to show that something is possible, but not certain: They could come by car. (= Maybe they will come by car.) They could be at home.
Can we use could for future?
We often use could to express possibility in the present and the future.
Could 10 sentences examples?

We can use could and couldn't to talk about abilities in the past.

I could swim when I was four. She couldn't ride a bike when she was three. He could walk when he was two.
I couldn't run when I was a baby. My mum couldn't swim when she was a child. ...
Could you play chess last year? Yes, I could.
How to express future possibilities?
We use might, may or could to say that we think something in the present or future is possible but we're not sure. I might see you tomorrow if you're in the office. There may be another issue that we don't know about.
Could, may or might convey the idea of future possibility. Of these, may expresses a stronger degree of certainty that an event will occur. For example: The ...
May 28, 2015 · May, Might & Could ; We might go to the party tomorrow night. She could decide to join us. ; I may go traveling next year. (future possibility) ...
Nov 27, 2013 · Possibility. Present Danny could be the team leader /Danny couldn't be the team leader. Past Danny could have been team leader / Danny couldn't ...
"Could" is a modal verb used to express possibility or past ability as well as to make suggestions and requests. ... Using "Could" in Present, Past, and Future.
Mar 23, 2023 · When you're talking about the possibility of something happening in the future, use can if something is very likely to happen. Could, on the ...
We use may, might and could to say that something is possible, but not certain: They may come by car. (= Maybe they will come by car.) They might be at home. (= ...
Jan 5, 2024 · could vs might (for expressing the future possibility) · 1 · certain and possible future · 1 · The use of the present simple and the future ...