新概念英语第二册第17课 Darling,it must be terrible to be grown up问中to

新概念英语第二册第17课 Darling,it must be terrible to be grown up问中to 新概念英语第二册17课it must be terrible to be grown up中to和be是什么用法?成长是 Darling ,it must be terrible to be grown up . ‘Darling,it must be terrible to be grown up ' 新概念英语第二册里面有一句话,it must be terrible to be grown up.长大成人真可怕啊.为 It must be terrible to be grown up. it must be terrible to be grown up中to be 是个什么成分啊? It must be terrible to be grown up!grown up与grow up有什么区别 it must be terrible to be grown up句中to可以不要吗 it must be terri it must be terrible to be grown up 中的grown up 什么词性 It must be terrible to be grown up!这句话里为什么要加be呢? it must be terrible to be grown up!be的作用