“Could be...”

English Lesson: Could be...

You tell your boyfriend that you have a surprise gift for him. He asks if it's chocolate, but you don't want to tell him.

Could be...

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could be…

This phrase is usually used alone, in response to a suggestion from someone else. It’s short for “It could be.”

A: Is that him, over there?

B: Not sure. Could be.

A: I heard it was gonna be rainy.

B: Could be.

However, we can only use “Could be” for a question or suggestion that uses a be-verb like “is,” “are,” etc.

A: Will they win?

B: They might.