I was at school at the time, slapping a boy who'd called me a nerd(,) when I spotted a drop of blood between my shoes.
Do I need to put a comma there? Why and why not?
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Sign up to join this communityI was at school at the time, slapping a boy who'd called me a nerd(,) when I spotted a drop of blood between my shoes.
Do I need to put a comma there? Why and why not?