Also, too, as well and either 📕

These words all mean "in addition". They go in different places in the sentence.

Also: before the main verb

I also speak French.

She is also a teacher. (after be)

Too and as well: at the end

I speak French too.

I speak French as well.

Either: in negative sentences

We do not use too or also in negative sentences. We use either at the end.

I don't like fish. I don't like meat either.

✗ I don't like meat too.

✓ I don't like meat either.

Short answers: so and neither

To agree with someone, use so (positive) and neither (negative):