They say: We are already eating bananas.
(I'm not sure about this sentence, as they aren't actually eating a banana/bananas - so it's hard to decide whether to use a plural or singular noun. I would choose the plural.)
Also, I would put the adverb already inbetween the aux and main verb.
I say: these are the real thing.
(These: the bananas are the real thing: banana.)
What you have are only chips
These are my opinions.
I am not a teacher.