1、主语+系动词+表语：e.g. He is a student. 2、主语+不及物动词：e.g. We work.3、主语+及物动词+宾语：e.g. Henry bought a dictionary.4、主语+及物动词+双宾语（间接宾语+直接宾语）：e.g. My father bought ...