在小学汉语拼音教学中,我们常常可以看到这样的情况,有些老师本人发音较准,但为学生正音却无能为力,究其原因是缺乏语音理论。语音是口耳之学。小学生主要是模仿老师的发音。但一些发音难点不是靠简单模仿能奏效的。如南京人n、l不分,教师发一个l,学生会发成n;吴语区平翘不分,把r发成l,学生怎么也模仿不象。遇到这种情况,教师就必须运用语音理论,指导学生发音。语音理论有很多,在小学里能用上的主要是指声、韵、调的实际音值,怎样才能发准这个音。如声母发音部位和方法;单韵母的舌位、唇形;复韵母、鼻韵母的发音要领、动程等。这些内容,有些老师在进修语音时不注意的。其实,恰当地运用 In the teaching of pinyin in primary schools, we often can see such situations. Some teachers are able to pronounce their speeches correctly, but they can not do anything for the students. This is due to the lack of phonetic theory. Voice is the ear of learning. Primary students mainly imitate the teacher's pronunciation. However, some of the difficulty of pronunciation is not a simple imitation can work. Such as Nanjing, n, l regardless, teachers made a l, students will be made n; Wuyao District Pingqian regardless, the r made l, the students how to imitate not like. In this case, teachers must use the theory of speech to guide students to pronounce. There are many phonetic theories. What can be used mainly in elementary school is the actual sound value of sound, rhyme and tone, and how to pronounce this sound. Such as the initial part and method of pronunciation; single vowel tongue position, lip shape; complex finals, nasal vowels pronunciation essentials, and so on. These contents, some teachers do not pay attention when studying pronunciation. In fact, proper use