look out为什么是动副词组
因为它既可以单独使用，也可以加宾语 ①look out phr. 小心 Look out! Don't let the fire get near the gasoline!小心!别让火靠近汽油! ②向外看；朝外面看 He drew the curtains and looked out. 他拉开窗帘向外望去。 ③look out of the window 朝窗外看 ④当心；小心；警惕 look out! 注意！留神！ ⑤朝着；面向；对着 Nine windows looked...