Either and Neither

1. When to use them

1.1. We use them in plenty of situations and one of the most common one is to say "tampoco"

1.1.1. I did not like that film

1.1.2. Me neither

1.1.3. Neither did I

1.1.4. I did not like that film either

1.2. We use it just in negative sentences

1.2.1. I liked that film

1.2.2. So did I

1.2.3. Me too

1.3. To choose between two options

1.3.1. What do you want a toast or a bread?

1.3.2. I do not care, either.

1.3.3. Ehhh neither I guess

1.4. To give two possibilities

1.4.1. You can read either the book or the newspaper.

1.4.2. Julian is either in his bedroom or in the kitchen

1.5. When we want to offer two negative options

1.5.1. Neither My father nor my mother speak French

2. How to use it

2.1. Either

2.1.1. Subject + auxiliary verb (-)+ verb + complement + either

2.2. Neither

2.2.1. Subject + neither

2.2.2. Neither + auxiliary verb + Subject