noun
a person, place, thing, or idea
adverb
modifies a verb, adjective, or other adverb and indicates time or location
preposition
shows the relationship between a noun (or pronoun) and other words in a sentence
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The project is behind time due to unexpected delays in the supply chain.
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We're behind time on the schedule because of all the changes that were made.
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We're really lagging behind time now, we need to pick up the pace.
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Her dreams were always just slightly behind time, never quite catching up to reality.