Those who can't do, teach.
Why do you put a comma between the subject and the verb?
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Sign up to join this communityThose who can't do, teach.
Why do you put a comma between the subject and the verb?
It's not well defined formally but the meaning of "those who can't do teach" could be "those who can't (teach) do teach", which is paradoxical This ambiguity arises because of one usage of "do", ie "do teach", which is equivalent to saying just "teach". Properly punctuated it would look like "those who can't, do teach" and has different meaning.
Think of the case, "those who can't do things teach things". The meaning is unambiguous without the comma and it has different meaning than "those who can't teach do teach". Consider also "those who can't do instead teach". This example replaces the comma with "instead".