Page 579 - Makino,Tsutusi.DictionaryOfIntermediateJGrammar

tokoro ga 505
B: k Z 3 -h', &b>b: < fTCf Qbr 0, [female speech]
(No, I'm afraid I can't.)

(g) A: %&&I&& L 7 b16 /t IC" L d: 5 ? [female or polite male speech]
(She is married, isn't she?)
B: ?ikfbIC"~~ kZ371', UP-+->^,
i
?
[female speech]
(She looks like it, doesn't she? But I heard that she's still single.)

1. Tokoro ga always appears in sentence-initial position.
2. In "S1. Tokoro ga Sz," Sz represents something one does not expect from
S,, as in KS(A).
3. Tokoro ga is used in response to the addressee's utterance, as in KS(B).
In this case, the sentence following tokoro ga is not what the addressee
expects to hear.

I. Although the sense of unexpectedness disappears, the conjunctions
daga, keredo(mo), and shikashi can replace tokoro ga in "S1. Tokoro ga
Sz," as in [I].
[I] El$&o)?l[lbC:%3 0 1:b~k,B,~U~k@B3kLI:~ I t E3fJf/
f;"# / /CfhZS / Lh'Ll, BSkL7':dECi%&f?91:,
(=KS(A))
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=
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However, daga, keredo(mo), and shikashi cannot replace tokoro ga l 3
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when "Tokoro ga, S" is a reply to a question, as in [2].
Tokoro ga, on the other hand, cannot be used when the situation does
not involve unexpectedness, as in [3].