Singular or pleural

"events" is plural, so it should be:

"... all of the above events are ..."

Actually the verb agrees with "all" , not "events"

All of the events are

One of the events is

IvanhrActually the verb agrees with "all" , not "events"

Not really, because "all" with a singular noun or uncountable noun takes a singular verb:

"All of the house is clean."

"All of the food has been eaten."

Yes, but it's not exactly the same. In the events example "all" functions as a pronoun whereas in yours "all" is an adverb.

I'll take your word for it. My point is simply that "all of the" can be followed by either a plural or singular verb, and it is the nature of the thing that "all of the" refers to that determines the number of the verb, not the word "all" itself. In this case, "events" is plural, and this is why the verb is "are".

Yes, I agree. In fact, I'd say that you should consider the whole phrase "all of the above events"/"one of the above events" when determining the number of the verb.

IvanhrIn fact, I'd say that you should consider the whole phrase "all of the above events"/"one of the above events" when determining the number of the verb.

Yes, that's probably the best way to look at it.