Used to and have to prefer the adverb in front of them.
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You hardly ever have to remind him.
Adverbs of frequency are often placed before the auxiliary in addition to remark or in short answers.
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I know I should take an exercise, but I never do.
Adverbs of frequency can come before the auxiliary when the auxiliary is stressed.
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I can never remember.
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I never can remember.
Order of adverbs and adverb phrases of manner, place and time when occur in one sentence. Expressions of manner usually come before expressions of place.
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He climbed hurringly out of window.
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He would study happily anywhere.
But away, back, down, forward, home, in, on, off, out, round, up usually come before adverbs of manner.
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She looked back anxiously.
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I went home quietly.
But sometimes some of them can come at the very beginning of the sentence.
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Round and round flied the plane.
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Away went runners.
Here and there also come before adverbs of manner but if adverbs of manner are hard, well, badly, here and there
should come after them.
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He stood there silently.
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He worked hard there.
Adverbs of time can come at the very beginning or at the very end.
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Everyday he queued patiently at the bus-stop.
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He worked hard in the garden today.