under
below and often covered by something above; also less than a limit
- For space, under is often directly below with possible cover from above.
- For time/quantity, under means less than a threshold (under an hour, under $50).
- Compared with below, under usually feels more physical and concrete.
Scene category
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Examples
Spatial examples
The cat is under the table.
We found the note under the pillow.
Time examples
The repair took under an hour.
Children under five can enter for free.
Related prepositions
Key differences
Under has two high-value uses for beginners: spatial position directly below (often with cover), and limits that are lower than a threshold.
Below is neutral vertical position. Under is usually more physical: directly below, often with something above it.
Underneath emphasizes directly under and sounds a bit more conversational. Under is broader and more common.
Within means before a deadline inside a time window; under means less than an amount (time/number/price).
Quick check questions (decision tree)
Is it directly beneath something, often with cover from above?
Yes -> choose under for physical position.
Does it mean less than a limit (time/price/age/number)?
Yes -> use under (under an hour, under $50, under 18).
Is it only a neutral lower level without cover meaning?
Yes -> below is often the better neutral choice.
Do you mean completion before a deadline window?
Yes -> prefer within/by, not under.
Common collocations
Spatial position
Time/quantity limits
States and process
Common mistakes
Avoid: The cat is below the table.
Use: The cat is under the table.
Reason: For a physical object directly beneath something, under is more natural than below.
Avoid: The project took below two hours.
Use: The project took under two hours.
Reason: Use under for numeric/time limits. Below is less natural for this pattern.
Avoid: Please finish under an hour.
Use: Please finish within an hour.
Reason: Within stresses deadline completion inside a time window; under stresses amount less than a threshold.
Mini quiz
Question 1
Choose the correct preposition: The shoes are ___ the bed.
Choose an answer
Question 2
Choose the correct preposition: The task took ___ an hour.
Choose an answer
Question 3
Choose the correct preposition: The report is still ___ review.
Choose an answer
Quick FAQ
What is the core meaning of the under preposition?+
Under mainly means directly below (often with something above), and it also means less than a limit in time/quantity (under an hour, under $50).
What is the difference between under and below?+
Under is usually more physical and concrete (directly beneath). Below is more neutral for vertical level.
What is the difference between under and underneath?+
Both can mean below, but underneath often sounds more emphatic or conversational for direct physical position.
Can under be used for time expressions?+
Yes. Use it for limits lower than a threshold: under an hour, under 30 minutes, under a week.
How do I choose between under and within for time?+
Use under for amount less than a limit; use within for completion before a deadline window.
What are high-frequency under collocations?+
Common ones include under the table, under pressure, under review, under control, and under construction.
What is a common learner mistake with under?+
Many learners use below for numeric limits (below two hours). In this pattern, under is usually the better choice.
What is a 30-second memory rule for under?+
Memorize two cues: physical below (often covered) and less-than limit. Then practice one space sentence and one time sentence.