The cat prowled around the cellar looking for mice

The cat prowled around the cellar looking for mice。1 looking-- - -是分词结构,这个动作与 prowled 同时发生,是伴随结构2 looking == and looked 。prowled and looked 是并列结构了。3 如果to look的话,说明look for - - -这个动作还没有发生,所以不能写成 to look。