caution about

• I caution
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• I was cautioning
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• I will be cautioning
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• we will be cautioning
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• I have been cautioning
• you have been cautioning
• you have been cautioning
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• we have been cautioning
• they have been cautioning

• I had been cautioning
• you had been cautioning
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• I will have been cautioning
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• you will have been cautioning
• he/she/it will have been cautioning
• we will have been cautioning
• they will have been cautioning

• cautioning

• cautioned

• having cautioned