What is the difference between the three where's?

Answer 1

There are actually more than three things that can be confused with where, sound-wise. Here are some:

Wear - to have on clothing as in "I like to wear that shirt." Can also be used to indicate damage as in "This rough road is going to put wear on my tires."

Where - a location. "Hey, where are you?"

Were - a prefix for half man, used with words like werewolf. This is not the same as the word "were" as in "Were you at the store yesterday?" and should also not be confused with "we're" (we are) as in "We're going to the store."

Ware - something to sell, traditionally pottery. He set up a tent to sell his wares. It is also sometimes used as a shortened form of "beware."

Answer 2

The three "where's" you may be referring to are "where," "were," and "wear." "Where" is an adverb used to inquire about a location or place. "Were" is the past tense of the verb "to be," used for plural subjects and as the past subjunctive. "Wear" is a verb that means to have clothing or an accessory on one's body.