Martin (1992: 231):
[4:164] CONJUNCTION He felt like relaxing,only he was upset about the race.
CONTINUITY No, I'm not busy.I was only reading.
Blogger Comments:
[1] In SFL theory, this is not conjunction, a non-structural resource of the textual metafunction, but a structural relation (extension: variation: subtractive) of the logical metafunction.
[2] The function of only here is interpersonal: a mood Adjunct of intensity (counterexpectancy: limiting), and so it does not mark a continuity relation with the previous message.
I
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was
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only
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reading
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Subject
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Finite
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mood Adjunct: intensity
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Predicator
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Mood
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Residue
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[3] Ironically, there is a continuative in this example, no, which marks a genuine relation of continuity with a previous message (not presented). As previously noted, Martin misconstrues genuine continuatives as marking a logico-semantic relation of addition.