Q:

Each and every one of XYZ + singular / plural Verb

I came across these two sentences :

Each and every one of the participants is expected to contribute generously to the cause.
Yet Each and everyone of the weird and wanky items have one thing in common they are all  aboslutely 100% true.

The first sentence uses a singular helping verb while the second one uses a plural helping verb.  Isn't the second sentence grammatically wrong ? Each and everyone  is followed by singular helping verb, correct ?

A:

Yes, technically the second sentence is incorrect. However, I don't think most English-speaking readers would notice the mistake. In casual or spoken English, people sometimes use incorrect subject/verb agreement if it "sounds" correct. For example, a verb might agree with the nearest noun instead of the subject of the sentence.
Unfortunately, "correcting" the error would make it worse:

Yet each and every one of the weird and wonky items has one thing in common...

This sounds awkward for two reasons. First, "having one thing in common" makes more sense when referring to a group of items together, not each individual item. Second, "items has" sounds like incorrect English, even though it's correct in the context of the larger sentence.

