note + noun
Mentioning or observing something
Note commonly takes a direct object.
She noted the error immediately.
Note in, for, or by?
Note is usually transitive without a fixed preposition. In, for, and by often belong to the wider sentence.
Quick answer
Using note correctly
We usually say note something directly. In can introduce a place or document, for can show purpose, and by can show method or authorship.
Please note the changes carefully.
I noted in my report that sales had fallen.
I noted in my report that sales had fallen.
Choose the pattern by meaning
These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.
note in + document
Writing or mentioning inside something
In usually refers to the location of the note.
He noted in the journal that the weather had changed.
note for + purpose
Recording something for later use
For introduces a purpose or recipient.
I noted the address for future reference.
See the difference in context
The same subject can take different constructions because each sentence answers a different question.
Construction
Example
Meaning
note in
She noted in her diary that she was tired.
record something inside a document or place
note for
He noted the date for later use.
show purpose or benefit
note by
A note by the editor appeared at the end.
by usually relates to authorship, not a fixed verb pattern
Common mistakes
Some combinations appear in real text but do not mean what learners often assume.
Adding unnecessary prepositions
Note often works without a preposition.
✕ I noted about the problem. ✓ I noted the problem.Confusing by with the verb pattern
By usually introduces the writer or method.
✕ She noted by the mistake. ✓ She noted the mistake.Quick practice
Choose the expression that matches the intended meaning.
1. Please ___ the final deadline.
2. He noted the issue ___ his report.
3. I noted the number ___ future reference.
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Frequently asked questions
Does note need a preposition?
Usually no. We often say note something directly.
What does note in mean?
It means record or mention something inside a document or place.
Can by follow note?
Yes, but usually to show authorship, as in a note by the editor.
Related preposition guides
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