Student or Learner
Are these sentences correct?
Not only you but his sister is wrong.
His sister as well as you is wrong.
Anybody please help me.
If you must express it that way:
Not only you but his sister is wrong also.
His sister, as well as you, is wrong.
Expressions such as 'with', 'together with', 'including', 'accompanied by', 'in addition to', or 'as well as' do not change the number of the subject. If the subject is singular, the verb is too.
The President, accompanied by his wife, is travelling to India.
All of the books, including yours, are in that box.