The bananas have rotten or the bananas are rotten?

Answer:
It would be the bananas are rotten or they have gone rotten.

If you want to use the past participle, it's "the bananas have rotted." The simple past tense is "the bananas rotted" (as in, "The bananas rotted before we got a chance to eat them").
First answer by Lanawanacottonsocks. Last edit by Eve T. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 2 [recommend question].