The word "clue"

 The word "clue" is a versatile English noun and verb, primarily referring to a piece of information that helps to solve a problem or mystery.

Let's break down its usage in sentences:

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1. As a Noun

The most common usage of "clue" is as a countable noun.

Meaning: A piece of evidence or information that helps someone find the answer to a problem, a crime, or a mystery. It can also refer to a hint in a game or puzzle.

Common Phrases/Collocations:

• A vital/important/key clue: Emphasizes the significance of the information.
• A strong/weak clue: Indicates the degree of certainty or helpfulness.
• Give/offer a clue: To provide information.
• Look for/search for clues: To seek information.
• Follow a clue: To investigate based on a piece of information.
• Pick up a clue: To notice or discover a piece of information.
• Not have a clue / haven't got a clue: An idiom meaning to have no idea at all.

Examples:

• The detective found a clue at the crime scene: a single red button.
• The crossword puzzle was difficult, but the first clue gave me a hint about the theme.
• The old map provided a vital clue to the location of the hidden treasure.
• "Do you know where Sarah went?" "No, I haven't got a clue." (Idiom: I have no idea.)
• The strange marks on the ground were the only clue as to what had happened.
• The scientist gathered clues from the rock samples to understand the ancient climate.
• He dropped a few clues about his surprise party, so I had an inkling.
• If you're stuck, I can give you a clue.
• We've been searching for clues all day, but found nothing useful.

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2. As a Verb

Less common than the noun, but still used.

Meaning: To give someone a piece of information that helps them understand or solve something. Often used in informal contexts, especially with "in" or "up."

Common Phrases/Collocations:

• Clue in (someone): To give someone the necessary information or context.
• Clue (someone) up on (something): To provide detailed information or background about a specific topic.
• Clue (someone) into (something): Similar to "clue in," often implying initiation into a secret or specific knowledge.

Examples:

• Can you clue me in on what happened at the meeting? I missed it. (Informal)
• The manager clued us up on the new project before we started working on it. (Informal)
• He clued his team into the latest developments in the market. (Informal)
• (Less common, but possible without "in/up"): The subtle smile clued me that she was joking. (Here, it means 'gave me a clue' or 'informed me')

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In summary:

• Use "clue" as a noun when you're referring to the piece of information itself. This is its most frequent and versatile use.
• Use "clue" as a verb (often with "in" or "up") when you mean to provide someone with information or background. This is more informal.

Understanding these distinctions will help you use "clue" effectively in your English sentences.