文都四六级备考指导栏目为大家分享英语四级考前辅导：5个语法误区3-双重否定不符合语法规则，希望对备考6月份英语四级的考生们有所帮助。更多英语四级考前辅导，英语四级备考信息，请持续关注文都四六级网站。
英语四级考前辅导：双重否定不符合语法规则
Double negatives are always ungrammatical 双重否定不符合语法规则
When two negatives are used to communicate a negative, then the usage is ungrammatical. The reason for this is that two negatives actually cancel each other out and create an affirmative statement. For example, the sentence ‘I don’t have nothing for you’is ungrammatical because the presence of two negatives technically switches the meaning to an affirmative one, so that it means ‘I have something for you.’
当两个否定词汇一同使用时，这种用法是不符合语法规则的。原因是两个否定实际上互相抵消，表达肯定的含义。例如，这句话“I don’t have nothing for you”不符合语法，因为严格意义上来讲这两个否定词汇在一起表达了肯定的含义，表示“我有东西给你”。
Even though the use of double negatives in formal speech and writing is nonstandard, the use of double negatives is common in areas such as informal speech and popular music.
即使在正式演讲和写作中使用双重否定是不标准的，但在非正式的演讲和流行音乐等领域双重否定是很常用的。
However, there is one use of double negatives that is entirely grammatical. In this use, the double negative is used to express and reinforce an affirmative.
然而，有一个双重否定的使用是完全符合语法的。在使用双重否定表达肯定或者加强肯定语气的。
I couldn’t not help him. [meaning: I strongly felt I should help him]
我要帮助他。
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