Adverbs give us information about time, manner, place, frequency, quantity, certainty, and degree. In English, we recognize many adverbs of manner, which tell us the way in which something happens, by the ending -ly. In German, it is often the case that adverbs are identical to their related adjectives, an example of which would be in the sentences Sie sind schnell and Sie essen schnell ("They are fast" / "They eat quickly").
There is one structure that is similar to the -ly you may know from English, which is the ending -erweise. You may remember that the noun die Weise means "the way" or "the manner." Because only certain adverbs have this ending, it is good to take note of them. For example, from the adjectives glücklich, üblich, möglich, nett, and überraschend, we get the following adverbs:
Glücklicherweise kam ein freundlicher Bauer vorbei.
Fortunately, a friendly farmer came by.
Caption 83, Märchen - Sagenhaft - Das hässliche Entlein
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Fremde Menschen werden üblicherweise gesiezt.
Strangers are commonly addressed formally with "Sie."
Caption 29, Cettina erklärt - Sitten und Bräuche
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In manchen Sprachen sind die Sprichwörter gleich oder ähnlich
In some languages, the sayings are the same or similar
und deshalb kommen euch möglicherweise die folgenden Beispiele schon etwas bekannt vor.
and therefore, the following examples may possibly already be somewhat known to you.
Captions 11-12, Eva erklärt - Sprichwörter
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...zusammen mit Herrn Krogmann, bei dem ich
...together with Mr. Krogmann, with whom I
netterweise im Moment wohne...
am kindly staying at the moment...
Captions 36-37, Die Pfefferkörner - Endspurt
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Überraschenderweise ärgerten sie sich aber nicht darüber.
But surprisingly, they were not angry about it.
Caption 86, Märchen - Sagenhaft - Die drei Brüder
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Further Learning
You can additionally look up dummerweise, erfreulicherweise, freundlicherweise, klugerweise, richtigerweise, normalerweise, vernünftigerweise and erstaunlicherweise, or look at this massive list of adverbs that have this structure, although not all of them may be commonly used. It's a better strategy to take note whenever you see one of these adverbs on either Yabla German or elsewhere, and start trying out sentences of your own. Remember that many adverbs will simply be identical to the adjective you already know!