withsomanydifferentformsofpoetrytochoosefrom,studentsmayeventuallywanttowritepoem...withsomanydifferentformsofpoetrytochoosefrom,studentsmayeventuallywanttowritepoemsoftheirown.这个句子中的tochoosefrom担任

　　withsomanydifferentformsofpoetrytochoosefrom,studentsmayeventuallywanttowritepoem...

　　withsomanydifferentformsofpoetrytochoosefrom,studentsmayeventuallywanttowritepoemsoftheirown.

　　这个句子中的tochoosefrom担任什么成分

　　我觉得是定语,老师说是宾补,可是宾语和宾补应该是逻辑上的主谓关系,而且不定式做宾补要省略to阿,到底是什么?