As writers we must ensure that the words we use are not only correct in themselves but also correct in relation to the words surrounding them i.e. their context.
Many of the mistakes below are misused homophones, i.e. words that have the same pronunciation but different meanings e.g. there & their or to, too & two.
Beware of this error as it is one of the easiest ways to tell a writer who is not well-versed in the English language, or who is but is simply a sloppy writer that does not proofread carefully enough. Don't simply rely on your spell-checker to find your mistakes.
As shown below spell-checkers are not infallible. I ran this piece through my favourite spell-checker (openoffice) and it did not mark any of the words as incorrect.
Eye halve a spelling chequer
It came with my pea sea
It plainly marques four my revue
Miss steaks eye kin knot sea.
Eye strike a key and type a word
And weight four it two say
Weather eye am wrong oar write
It shows me strait a weigh.
As soon as a mist ache is maid
It nose bee fore two long
And eye can put the error rite
Its rarely ever wrong.
Eye have run this poem threw it
I am shore your pleased two no
Its letter perfect in it's weigh
My chequer tolled me sew.
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