新东方在线为大家精心整理了GMAT逻辑入门指导之More on Negation的相关内容，分享给大家，供大家参考，希望对大家有所帮助!

　　(十五)More on Negation

　　Necessary assumption. Use negation. I said these two sentences hundreds of times here. If you master the technique of negation, you should be able to solve the necessary assumption problems easily and pass GMAT with flying colors.

　　When you negate an answer, just negate it. Try not to turn it into its opposite. Also, negate either the verb or the quantity, but not both.

　　To negate an if-then statement, negate ONLY the then clause. So "if A, then B" would become "if A, then not B"