There's a difference between prescriptive grammar (textbooks telling you how to use language) and descriptive grammar (describing how language is actually used). Starting a sentence with 'and' is an example of something ungrammatical according to the former, but grammatical according to the latter. Other examples are not ending a sentence with a preposition (Who are you talking to? 'should be' to whom are you talking) or not splitting an infinitive (to not do something 'should be' not to do something). |