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Answers
Answer:
Fast and quick mean moving with great speed. Fast is both an adjective and an adverb. Quick is an adjective and the adverb form is quickly.
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It was a fast train.
We need to have a quick chat before the meeting.
Fast and quick are adjectives.
You walk very fast!
Not: … very fastly.
We should do it as quickly as possible.
Fast and quickly are adverbs.
We usually use quick to refer to something happening in a short time, or a shorter than expected time:
We stopped for a quick snack.
Not: … a fast snack.
I just need a quick answer.
Not: … a fast answer.
Fast refers to things that happen or go at high speed, e.g. a train, a person running:
She loves fast cars.
Not: She loves quick cars.
Note the common expression fast food to refer to food such as hamburgers, which are cooked and served in a very short time in restaurants:
You shouldn’t eat so much fast food. It’s not good for you.
See also:
Comparative and superlative adjectives
Adverbs: comparative and superlative forms