I don't understand how these sentences were converted from an adjective to an adverb can someone explain.
Adjective sentence: It is obvious that the account should be written off.
Adverb sentence: The account should be written off.
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Sign up to join this communityI don't understand how these sentences were converted from an adjective to an adverb can someone explain.
Adjective sentence: It is obvious that the account should be written off.
Adverb sentence: The account should be written off.
The only adjective in your first sentence is 'obvious'.
In both sentences, 'written off' is a (phrasal) passive participle. 'Off' could be considered an adverb, but it is usually taken as part of a phrasal verb, since 'write off' has an idiomatic meaning beyond 'write' and 'off'.
In "a write-off", 'write-off' is a noun, and in "a written off account", 'written off' is a (passive) participle phrase used as an adjective.