... operator. Semantically speaking, Frank has pointed out the importance of negation in establishing a counter–part” of affirmation. Grammatically speaking, the insertion of “not” in predicate ... operator in a negative, here, operator is not a normal auxiliary expressing grammatical function, but a modal auxiliary. With a negative modal auxiliary, verb phrase falls into a situation that ... ask for confirmation of the affirmative statement. In the following examples, the tag questions are underlined. Contractions are usually used in negative tag questions. For example:Affirmative...