填isn't he.
含有推測(cè)語(yǔ)氣的句子按去除推測(cè)的實(shí)際情況做反義疑問句.如：
You must be joking,aren't you?
He can't be at home now,is he?
They might have finished their work already,haven't they?
They might have finished their work yesterday,didn't they?否定部分是什么由構(gòu)成的？You must be joking去除推測(cè)相當(dāng)于You are joking所以后面用aren't you?He can't be at home now去除推測(cè)相當(dāng)于He isn't at home所以后面用is he?They might have finished their work already去除推測(cè)相當(dāng)于They have finished their work所以后面用haven't they?They might have finished their work yesterday去除推測(cè)相當(dāng)于They finished their work yesterday所以后面用didn't they?去除推測(cè)后做反義問句和平常的一樣了。