means "for a" or "considering": from what you know about
something, you expected one thing, and the result is different – better or
worse. It goes straight after a noun, or after the plain form of a verb.
、。
For your first time, you're quite good.
、。
For a child, he/she is very mature.
、。
For a professional, he makes a lot of mistakes.
さん3、。
Considering I studied for three whole hours, I didn't do very well.
The second half is a judgment about what is in front of you. It is not a
request or a plan: ×初めてにしては、もっと練習してください.
にしては or わりに
means much the same and is the one for adjectives:
,
. にしては takes nouns and verbs, and an
adjective before it sounds wrong.
、。
This place isn't great on service, considering how expensive it is.
、。
For a high-end restaurant, the service here isn't good.
With a noun, にしては sets up what the noun normally implies – a child, a
professional, winter. わりに weighs one amount against another – the price,
the effort, the time spent.