How to use 'and so do ...'

As variety in your style of writing, you can use ‘and so do …’. The following are examples of how to use ‘and do so …’ correctly.

1 She likes to sing and do so do I.
2 They could dance when they were small and so could I.
3 You can spell most of the words in English correctly and so can we.
4 He is a good singer and so are they.
5 We are salesmen and so is she.
6 The women walk very fast and so does he.

Notice that the verb after ‘so’ follows the tense of the verb immediately after the subject.