What is difference between "Either" and "Or"?
can I use only "Or" ?
Example: "Do you prefere apple or orange ?

I'm from Brazil and I am started to study English.

Question

What is difference between "Either" and "Or"?
can I use only "Or" ? 
Example: "Do you prefere apple or orange ?

I'm from Brazil and I am started to study English.

Answer

Either is generally used with or to signify a choice "you can have either _____ or _____". Confusingly, either can also mean "as well" or a connection between previous sentences. for example " I don't want that either"

"you can eat either the apple or the orange"

but preference is just with or "Would you like the apple or the orange?"

Answer

Either is generally used with or to signify a choice "you can have either _____ or _____". Confusingly, either can also mean "as well" or a connection between previous sentences. for example " I don't want that either"

"you can eat either the apple or the orange"

but preference is just with or "Would you like the apple or the orange?"