it is a challenge for you中for you是什么成分,是不是状语表伴随

it is a challenge for you中for you是什么成分,是不是状语表伴随 swimming is good for you这个句子中for you是什么成分? 表语后还能有什么成分pray you for mercy中for mercy 是什么成分,I am sick of it It is good for you的成分分析啊? it is convenient for you to do 这里for you在句中是什么结构 It is only for you 中 only是不是既可以看做副词也可看做形容词? We are all here wating for you.中的waiting for you在句中是什么成分? it is bad for you I bought a pen for you中for you做什么成分 I am sorry for it .中for it 是什么成分 请问It is only for you 中it 是形式主语吗?only for you here is a letter for you.who is it (