Expert in/on

[nq:1]Is there any differenc when you use one of those prepositions?[/nq]
Dunno... I'm an expert in electonics design, I'm an expert on left- handed windlasses.
I suppose if there is consistency, I would be an expert "in" a field, but an expert "on" a topic.
Paul Burke

[nq:2]Is there any differenc when you use one of those prepositions?[/nq]
[nq:1]Dunno... I'm an expert in electonics design, I'm an expert on left- handed windlasses. I suppose if there is consistency, I would be an expert "in" a field, but an expert "on" a topic.[/nq]
You could also be expert "at" doing something.

Regards
John
for mail: my initials plus a u e
at tpg d

[nq:2]Dunno... I'm an expert in electonics design, I'm an expert ... expert "in" a field, but an expert "on" a topic.[/nq]
[nq:1]You could also be expert "at" doing something.[/nq]
"expert *of* STh" is used?

°¿°

[nq:2]You could also be expert "at" doing something.[/nq]
[nq:1]"expert *of* STh" is used?[/nq]
Not commonly. It is possible that the word "of" could follow the word "expert" in a sentence, but not with a meaning similar to the above.

Regards
John
for mail: my initials plus a u e
at tpg dot com dot au

[nq:2]"expert *of* STh" is used?[/nq]
[nq:1]Not commonly. It is possible that the word "of" could follow the word "expert" in a sentence, but not with a meaning similar to the above.[/nq]
Thanks.
Google counts it 650,000 times, when "expert at", "expert on" and "expert in" are much more frequent (2.48M, 15.3M, 18.5M).
[nq:1] Regards John for mail: my initials plus a u e at tpg dot