8.144 two negative facts

When you want to link two negative clauses, you usually use 'and'.

However, you can use 'or' when the clauses have the same subject and the same auxiliaries. In the second clause, you omit the subject, the auxiliaries, and 'not'.

For example, instead of saying 'She doesn't drink and she doesn't smoke', you can say 'She doesn't drink or smoke'.

You can also link negative clauses by using 'and neither', 'and nor', or 'nor'. You put 'be' or the auxiliary at the beginning of the second clause, in front of the subject.

For example, instead of saying 'My sister doesn't like him, and I don't like him', you can say 'My sister doesn't like him, and neither do I'.

'But neither' and 'but nor' can also be used.

When you use 'and' to link two negative statements, you can put 'either' after the second statement.

For emphasis, you can join two negative clauses by using 'neither' and 'nor'. This use is explained in paragraph 8.186.