These distributive words are normally used with singular nouns, and are placed before the noun.
Each, either and neither can be used with plural nouns but must be followed by ' of ' :
Each is a way of seeing the members of a group as individuals:
Every is a way of seeing a group as a series of members:
It can also express different points in a series, especially with time expressions:
Either and Neither are concerned with distribution between two things - either is positive, neither is negative: