Kei te waiata a Rob rāua ko LilyRob and Lily are singing. Becomes;
Kāore a Rob rāua ko Lily i te waiataRob and Lily are not singing.
Ki te whai pūtea au, ka haere au ki te mātakitaki i a Ed Sheeran.Thirdly, mehemea can be used to talk about hypothetical and impossible things. If I was a goldfish I'd live in a lily pond.