at a fast speed OK
at fast speed NO
at full speed OK
at the full speed OK

Am I correct?

Answers

jeffery021

03 Dec 04:03 PM

English (US)

at fast speed は実はアリです。
at the full speed は聞いたことがないですね。

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Highly-rated answerer

KAPUCHINO

03 Dec 04:05 PM

Japanese

@jeffery021
thank you again.
but the native speakers I've asked up untill now says at a fast speed is the right one. Do you think it's rare to say at fast speed? or is there something other than that?

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jeffery021

03 Dec 04:07 PM

English (US)

@kapuchino yes it's something you would see more commonly in a news headline than in a daily conversation.

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Highly-rated answerer

KAPUCHINO

03 Dec 04:12 PM

Japanese

@jeffery021
I see, I know they generally omit articles and such in headlines.
at a fast speed
at full speed
these are the most common after all, I guess.
I appreciate your help!

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