Can “however” begin a
sentence? Yes, of course it can!
However long he works at the project, John still is unable to
complete it.
But, “however” can also begin
a sentence like this one:
He
paid full price. However, he was not happy with his purchase.
In this case “however” acts as
conjunctive adverb, joining the ideas together in a cause and
effect relationship. But, since many consider the second usage to
be faulty, it is better to avoid it by using, instead the
following construction:
He
paid full price; however, he was not happy with his purchase.
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Nevertheless:
Be Careful with However
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