You don't understand sth中sth做什么成分

i like doing sth.中doing做的什么成分? have sth to do中to do做什么成分 why not do sth.=why don't you do sth.还等于什么 Why not do sth.=Why don't you do sth.=什么? the best way to do sth 中to do sth 做什么成分 you don't understand什么意思 You don't understand? you don't understand 请教share sth.with sb.中with sb.做什么成分 "sb.+happen+to do sth."句型中不定式做什么成分? tell sth to sb ,其中to sb 在句子中做什么成分? I am willing to do sth 中不定式做什么成分?（关于一些句法）