English example sentences with "up to something"

The boys were whispering; I knew they were up to something.
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You're up to something.
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Tom must be up to something.
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This fellow is up to something. I can feel it in my spleen.
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Tom is up to something.
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He's up to something.
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She's up to something.
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They're up to something.
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I knew Tom was up to something.
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I think Tom is up to something.
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Tom knows Mary is up to something.
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Tom is always up to something.
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You're up to something, aren't you?
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Tom knew Mary was up to something.
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Tom realized Mary was up to something.
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I know Tom is up to something.
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If you loiter here much longer, people will think you're up to something.
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The kids are up to something.
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You're always up to something.
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Tom has been up to something.
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I think Tom has been up to something.
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"Are you sure he's not up to something?" "Look, I appreciate your concern, I do, but we don't have enough reason to worry about this now."
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Tom is definitely up to something!
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Tom is definitely up to something.
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It looks like Tom is up to something.
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It looks like Tom and Mary are up to something.
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I think Tom and Mary have been up to something.
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I think Tom and Mary are up to something.
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I knew Tom and Mary were up to something.
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I know Tom and Mary are up to something.
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They're definitely up to something.
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I suspect Tom and Mary are up to something.
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I suspect that Tom and Mary are up to something.
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I suspect Tom is up to something.
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I suspect that Tom is up to something.
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Tom and Mary are up to something.
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Tom is up to something, isn't he?
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I think that Tom has been up to something.
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I think that Tom is up to something.
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I knew that Tom was up to something.
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I know that Tom is up to something.
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Tom knows that Mary is up to something.
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Sami was up to something.
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Mary is up to something, isn't she?
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The village drunk is always up to something.
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Tom realized that Mary was up to something.
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Tom is up to something. I just don't know what it is.
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Tom's up to something; I just don't know what it is.
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Ziri is definitely up to something.

Donald has always known that Jessica was up to something.

David was definitely up to something.

I know you're up to something.

Your cousin is up to something shady.

Have you been up to something?

I feel like he's up to something quite fishy and I can't put a finger on it as of yet.

He looks like an angel, but I can tell he's up to something.