不是还有...吗

你 不是还有 半个小时才下班 吗

(我这都快换班了) ── Previous context

“Don't you still have half an hour before your shift ends?”

但他 不是还有 个妈 吗

(虽然他人不在了) ── Previous context

“but his mother is still alive.”

不是还有 半年就交房了 吗

(你这又去花桥看房子了) ── Previous context

“Isn't it just six months until the handover?”