口诀转换英语句型转换句型转换是英语学习中一大难点，很多学生在做这类题时频频出错，下面是我们结合日常学习总结的转换口诀。一、肯定句变否定句：分两种变化1. 找插找：如果句子中有系动词（is，am，are，was，were）、情态动词（can, may, must, could, might, shall , should, will, would, need,）助动词（have，has）时，直接在后面插入not。例：My parents will have dinner at seven this evening.直接在will后插入notMy parents will not have dinner at seven this evening2.如果句子中不存在以上词语，要遵循找判分插找：找出句中的实意动词。判：根据实意动词判断句子的时态。分：将实意动词分成时态标志词和动词原形。插：在助动词后插入not。例一：She often watches TV on Sundays.找到实意动词watches判断时态：一般现在时分成时态标志和动词原形does和watch插入not：在两个词中间插入not，并注意细节变化。She often watches TV on Sundays. does watchnotShe doesnt often watch TV on Sundays.（频率副词要用在实意动词前、助动词后）例二：Our teacher told a story to us.找到实意动词told判断时态：一般过去时分成时态标志和动词原形did和tell插入not：在两个词中间插入not，并注意细节变化。Our teacher told a story to us. did tellnotOur teacher didnt tell a story to us二、肯定句变一般疑问句：分两种变化1.找提找：如果句子中有系动词（is，am，are，was，were）、情态动词（can, may, must, could, might, shall , should, will, would, need,）助动词（have，has）时，直接将这些单词提到句首，句子后边问号，注意人称变化。例：My parents will have dinner at seven this evening.直接将will提到句子前面，句后变问号，注意人称变化。Will your parents have dinner at seven this evening2.如果句子中不存在以上词语，要遵循找判分提找：找出句中的实意动词。判：根据实意动词判断句子的时态。分：将实意动词分成时态标志词和动词原形。提：在助动词提到句子前面，句后变问号。例一：She often watches TV on Sundays.找到实意动词watches判断时态：一般现在时分成时态标志和动词原形does和watch提助动词提到句子前面，句后变问号，并注意人称变化。She often watches TV on Sundays. does watchDoes she often watch TV on Sundays.例二：Our teacher told a story to us.找到实意动词told判断时态：一般过去时分成时态标志和动词原形did和tell提助动词提到句子前面，句后变问号，并注意人称变化。Our teacher told a story to us. did tellDid your teacher tell a story to you？三、特殊疑问句的变化：每一个特殊疑问词都对应