Talking about difficulty or position
In a spot is an idiomatic expression meaning in trouble or in a situation.
Neither phrase is a common fixed expression by itself. The correct preposition depends on the wider sentence.
Of spot is generally nonstandard unless spot depends on another noun phrase. In spot can occur when in introduces a place or situation, such as in a spot or in that spot.
These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.
In a spot is an idiomatic expression meaning in trouble or in a situation.
Use in with spot when talking about a specific place.
Use of when spot belongs to another noun phrase.
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.
English normally needs a fuller structure.
✕ the picture of spot ✓ the picture of the spotSpot usually needs a determiner in location phrases.
✕ in spot ✓ in a spotIn marks place; of links nouns together.
✓ the edge of the spotChoose the expression that matches the intended meaning.
Paste the complete sentence below. Linguix checks the preposition together with grammar, spelling, punctuation, and style.
Not usually by itself. English normally uses a fuller phrase such as edge of the spot.
Only when in introduces a place or situation, usually with an article or determiner: in a spot, in that spot.
It means being in difficulty or in an awkward situation.
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