A question

[Jenny Lau]

I could judge where the sound came from.
If I cancel "from", is the sentence correct?

[Red5]

No, I think you need the "from" in the sentence for it to work.

[RonBee]

I agree with Red. You can't remove "from" from that sentence and have the sentence still mean something in English.

[Tdol]

If you really want to remove 'from', you'd have to use 'whence', which is a bit old-fashioned.

[Jenny Lau]

OK, I see. Thank you all!