Learn English – “A slow moving” vs. “A slowly moving”

adjectivesadverbsgerundsmodifiers

which of the following sentences is even more correct?

  • There is a slow moving vehicle ahead.

Or

  • there is a slowly moving vehicle ahead.

What is the difference between them.

To me, the second one sounds more correct as “slowly” modify moving, on the other hand the first one sound awkward as “slow” is modifying the the gerund “moving”. It means adjective cannot modify gerund, moving.

Best Answer

They are both correct and mean almost the same thing, but with a very slight difference.

There is a slow-moving vehicle ahead.

By using the compound adjective "slow-moving," you are implying that moving slowly is an intrinsic property of the vehicle. It's moving slowly right now because it is the type of vehicle that usually moves slowly (e.g., a garbage truck).

There is a slowly moving vehicle ahead.

By using the adverb "slowly," you are really only describing the movement right now and nothing about its habitual behavior. Maybe it's an ordinary car that just happens to be moving slowly at the moment because the driver is texting on his phone or something.

Which one is correct will depend on the situation and the type of vehicle you are talking about.

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