SHORT ANSWERS WITH SO AND NEITHER

In English, we can use the words so, neither, too and either to say that what is true for some person is also true for us. 

The word so shows agreement with positive statements.

The word neither shows agreement with negative statements. 

When we have the verb be in the simple present if we need to agree we use:

- So am I.

If we need to disagree we use:

- I don't.

We use so + auxiliary/modal verb + pronoun:

- "I like tea without sugar.'

'So do I.'

We use nor/neither + auxiliary/modal verb + pronoun:

- "I don't like tea with sugar.'

'Nor do I.' or 'Neither do I.'

We use pronoun + auxiliary/modal verb + not (-n't):

- "I like tea without sugar.'

'I don't.'

We use pronoun + auxiliary/modal verb:

"I don't like tea with sugar.'

'I do.

- I went to the park yesterday.

So did I

- I have been to Spain 3 times

So have I