15. ELLIPTICAL SENTENCES USING TOO - SO - NEITHER - EITHER

SO

SO is used to show agreement with positive statements.

SO + Auxiliary + Subject (pronoun)

The Auxiliary needs to agree with the verb tense in the original statement.

It is similar to using TOO at the end of a sentence.

NEITHER

Neither is used to show agreement with negative statements.

Neither + Auxiliary + Subject (pronoun)

The Auxiliary needs to agree with the verb tense in the original statement.

It is similar to using either at the end of a sentence, although Neither is more commonly used, especially in spoken English.

A: I don't understand Spanish.

B: Neither do I. (= I don't understand Spanish either.)

A: I cannot swim.

B: Neither can I. (= I can't swim either.)

Sometimes people respond Me Neither instead of Neither + Auxiliary + Subject though this is very informal spoken English.