主系表结构,即:主语 + 系动词 + 表语【 典例分析】The girl is very pretty. 扩展:The ten-year-old girl is very pretty. 解析:在“主系表”结构中,系动词和名词、形容词、介词短语、分词或从句等构成谓语。常用的系动词除了be动词以外,还有感官动词look, feel, sound, smell和...