Prepositions: useful is used in useful for , useful for and useful to . The words useful to are also found in constructions such as It is useful to do, in which to marks an infinitive rather than being a preposition.
発音 副詞 usefully (comparative more usefully, superlative most usefully) In a useful manner; in a way that achieves something I would rather have it said, " He lived usefully," than, " He died rich."
名詞 usefulness (countable and uncountable, plural usefulnesses) The quality or degree of being useful. The usefulness of his latest reorganisation has been disputed.
名詞 utility (countable and uncountable, plural utilities) The state or condition of being useful; usefulness.
