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陈述句中表示正式，表示一种强调时，不用缩写，写作does not。疑问句中表难道时，必须写成doesn't。 does not 读音：英 [dʌz nɒt] 美 [dʌz nɑːt] 释义：不，不是，否定就用。语法：在复. What does he doing 是错的，正确的应该是what does he do.因为does后面也就是助动词后面要接动词原形.what does he do和what is he doing的区别：读音不同、中文意思不同、用法不同一.

比如书上一个例句:what books does mr.li's daughter read at home in the evening?what does mr.li&… Do和does的区别和用法区别是：do 是动词原形，用于第一人称、第三人称的复数 (i/you/we/they)。does 用于第三人称单数 (he/she/it) does 用于第三人称单数。do用于一般现.