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Discover LudwigSuggestions(5)
"a backpack" is correct and usable in written English.
You can use it when referring to a bag with shoulder straps that can be used to carry items. For example, "John carried a backpack filled with textbooks on his way to school."
Exact(60)
Ben had a backpack.
About wearing a backpack.
Best: a backpack.
He shrugged off a backpack.
So I bought a backpack.
"I don't carry a backpack".
A backpack that generates electricity?
A backpack had been recovered.
"He was in a backpack.
I just have a backpack".
Of course, it is also a backpack.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com