His car runs as fast as if not faster

His car runs as fast as if not faster his car runs as fast as ,if not faster than ,a race car这句话如何 My car runs as fast as,if not faster than,a race Who runs as fast as Tom ______? 怎样理解 He runs as fast as wind.He runs as wind as fast. 这个题是怎么回事呢?The old man runs very fast as if he _____a young m then he drove his car as fast as he could drove towards the Mike runs as fast as Ben该一般疑问句 改为一般疑问句：Mike runs as fast as Ben. Jim runs as fast as Tom.(否定句） my sister runs as _____(fast)as my brother Milk runs as fast as Ben .(改为一般疑问句)