请问：I don't know how to do this problem.中how to do this problem在句子中做什么成分?

I don't know how to i don't know how to 请问i don't know (how i should do) next 这句话为啥是错的? how to play basketball?I don't know.who know? I love you but don't know how to love请问是什么意思 i don't know how to do it句型转换i don't know[ ][ ][ ]do. i don't know how与 i don't know why有什么区别? i don't know how i feel的中文 I don't know how can I ask questions? 英语翻译i don't think i know how.. I don't know.Do it how can i I don`t know how to have fun.(同义句） I don`t know how to have a good time.I don`t know how to()( I don t know how I should do it同意句I don t know how ____ ____ it How much I love you ,you don't know I really don't know how to explain this pnblem how much i love you,how much i love you,you don't know,you don't know.是什么歌啊how much i love you,how much i love you,you don't know,you don't know. I don't know how to love you翻译中文 sorry,i don't know how to answer your question?