Identifying something from evidence
Use tell by when recognising or judging something from a clue or sign.
Tell has several meanings, and the preposition changes with the meaning. Some combinations are standard verb patterns, while others are separate phrases.
Tell by means identify through evidence. Tell of and tell about mean describe or relate information. Tell from appears in the pattern tell one thing from another. Tell in is uncommon as a direct combination and usually belongs to a larger phrase such as tell in detail.
These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.
Use tell by when recognising or judging something from a clue or sign.
Use tell about to describe or explain a subject.
Tell of is more literary or formal than tell about.
Use tell from to show the difference between two things.
Tell is not usually followed directly by in. In normally belongs to another phrase such as in detail or in confidence.
The same subject can take different constructions because each sentence answers a different question.
Some combinations appear in real text but do not mean what learners often assume.
Tell from normally compares one thing with another.
✕ I can tell from easily. ✓ I can tell the original from the copy easily.Tell about is more common in everyday speech. Tell of sounds more formal or literary.
✓ She told us about the accident.In usually belongs to another phrase, not directly to tell.
✕ She told in the problem. ✓ She told us about the problem.Tell often takes a person as an object before the topic.
✕ He told about the delay. ✓ He told us about the delay.Choose the expression that matches the intended meaning.
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Both describe information or stories, but tell about is more common in everyday English, while tell of is more formal or literary.
Yes. It means identify or judge something from evidence or signs.
Because in is usually part of another phrase, such as in detail, rather than a direct preposition after tell.
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