BOTH, NEITHER, EITHER

BOTH, NEITHER AND EITHER

BOTH: it refers to two things or people. It has a positive meaning and it takes the verb in plural. 

                  Ex: These are both my books. Both books are mine
Ex: Both cars are in the garage. 
Ex: Both James and Sarah are in the school. 

NEITHER: not one and not the other. It refers to two things or people. It has a negative meaning and it takes the verb in singular.  

Ex: Neither of those books are mine (Not the blue one, not the red one)
Ex: Neither of the cars are in the garaje 
Ex: Neither James nor Sarah are at home. 

EITHER: one or the other. It refers to one thing where there are two possibilities. It has positive and negative meaning and it takes the verb in singular.
Ex: What do you prefere, English or Science? I like either
Ex: I would like to eat either chinesse or japanese food. 

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LET'S PRACTISE

1. http://www.confusing-words.com/?toload=inner.Body_ConfusingWords&id=6910&BereichID=134&title=+%3Ca+href%3D%3F%3EConfusing+Words%3C%2Fa%3E+%3E+&title2=both%2C+either%2C+neither
2. http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-4826.php
3. http://www.grammarbank.com/both-and-neither.html
4. http://www.examenglish.com/grammar/b1_both_either_neither.ht
5. http://www.agendaweb.org/grammar/neither-either-both-exercises.html

Inés from 6ºC has done this fantastic table to explain the differences between BOTH, EITHER AND NEITHER. I'm sure it will be uselful to all of you.