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词组 fast
释义 fast
Fast, quick, rapid, and swift are all used to say that something moves or happens with great speed. Rapid and swift are not usually used in conversation.


'fast'


Fast is used both as an adjective and an adverb. There is no adverb 'fastly'.
...fast communications.
I ran as fast as I could.


'quick'


Quick is an adjective. You do not usually use it as an adverb. Instead you use the adverb quickly.
It is this muscle which gives us our quick, springing movements.
I walked quickly up the passage.

In conversation, you can use the comparative form quicker as an adverb.
I swam on a bit quicker.
Goats could ruin a farmer's field quicker than baboons.

In writing, you usually use more quickly.
He began to speak more quickly.

You can use the superlative form quickest as an adverb in speech or writing.
The child may cool off quickest if the parents go about their business.


'rapid' and 'swift'


Rapid and swift are adjectives. The adverbs corresponding to them are rapidly and swiftly.
Jobs tend to be plentiful at a time of rapid economic growth.
They walked rapidly past the churchyard.
...darting in swift pursuit of its prey.
He walked swiftly towards home.


asking about speed


Fast is the word you usually use when you are asking about the speed of something.
How fast is the fish swimming?
...looking out of the windows to see how fast we were going.


vehicles


You use fast to say that a vehicle is capable of moving with great speed.
...a fast car.
...a fast train.


people


You do not usually use fast to talk about people, but you can use it in front of words like 'driver' and 'runner' to say that someone drives quickly or is capable of running quickly.
Not being a fast runner, I was glad I had parked close to the hall.


changes


When you are talking about the speed at which something changes, you usually use rapid or swift.
People are worried about the rapid and massive increase in military spending.
Swift change is a characteristic of decay, not of growth.


no delay


Fast, quick, rapid, and swift are all used to say that something happens without any delay.
I only got a fast return on my investment once.
They are pressing for a quick resumption of arms negotiations.
...managers plagued by demands for rapid decisions.
The response was swift and intense.


short duration


You can use quick, rapid, or swift to say that something lasts only a short time.
...a quick visit.
You are likely to make a rapid recovery.
...the swift descent from gentility to near-poverty.

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更新时间:2024/10/30 12:23:10