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have observed

  • present perfect
    of observe.
    observe
    verb (used with object)
    to see, watch, perceive, or notice.

Example Sentences

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See Examples For:

Researchers at the University of Oxford have observed virus-like particles assembling themselves one molecule at a time, uncovering the surprisingly simple rules that allow complex biological structures to form with remarkable reliability.

From Science Daily ● Oct. 22, 2026

Scientists have observed temperatures underneath the sea surface greater than 18 degrees above the baseline.

From Los Angeles Times ● Oct. 8, 2026

It also allows the "network" to talk about what they have observed about the patient and their own feelings.

From BBC ● Aug. 26, 2026

Finally, analysts have observed that outdated restaurants in poor condition have hurt Wendy’s sales, and that the company needs to ensure sufficient staffing and cleanliness.

From MarketWatch ● Aug. 8, 2026

But what I have observed is painfully little.

From "The Cruel Prince" by Holly Black