不是吗

isn't that so?

no; not so / (bound form) not; un-

fault / blame

no / is not / not

variant of 是[shi4] / (used in given names)

to be (followed by substantives only) / correct; right; true / (respectful acknowledgement of a command) very well / (adverb for emphatic assertion)

(coll.) what?

used in 嗎啡|吗啡[ma3 fei1]

(question particle for "yes-no" questions)