Hi This is surprisingly difficult! I found a link that explains it, which is below A simple rule for your example might be that you do not need the hyphen when you are just putting nouns together to make a noun phrase: alphabet tracing activity However, you might use it if the phrase becomes a verb or adjective ... - It's taken him ten minutes to alphabet-trace the letter M - I'm quitting as a primary school teacher.
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dave_anon I think it's a matter of style rather than correct punctuationI agree. I think that the answers you provided, directly and through the link, are helpful, but learners should be aware that this is a grey area. Michael Swan notes in his normally very helpful Practical English Usage, "The rules about hyphens are complicated, and usage is not ve