a word that comes before a noun, pronoun, or the ‘-ing' form of a verb, and shows its relation to another part of the sentence. For example in the sentences ‘Was anyone injured in the accident?', ‘To save water, take a shower instead of a bath', and ‘Don't leave without finishing your dinner', the words ‘in', ‘instead of' and ‘without' are prepositions. 介词(如Was anyone injured in the accident 和 To save water, take a shower instead of a bath 中的 in 和 instead of of )