I
noun
1
BAD : I wrote him a notice saying that the package had arrived.
GOOD : I wrote him a note saying that the package had arrived.
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notice = a short written statement giving information or directions, usually found in a public place: 'There was a notice on the wall saying
"Private property. No parking."
note = a short informal letter or written message from one person to another: 'Just a quick note to say that Helen had a baby boy yesterday.'
2
See NOTICE 3 (↑ notice )
3
BAD : It was so crowded that at first I didn't take any notice of him.
GOOD : It was so crowded that at first I didn't see/notice him.
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take notice of = pay attention to: 'Nobody ever takes any notice of what I say.'
notice = become aware of; see: 'I didn't suspect anything until I noticed that my chequebook was missing.'
II
verb
BAD : I could notice that he was not enjoying himself.
GOOD : I noticed that he was not enjoying himself.
GOOD : I could see that he was not enjoying himself.
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Notice is not used with can/could : 'They were so busy that they didn't notice how late it was getting.'