英语I don't know how old you are.Can you tell me who is on duty today?为什么前面一句是陈述句语序,而后面一句be在前面呢

英语；I don't know I don't know how to i don't know how to how to play basketball?I don't know.who know? 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 will go on这句英语翻译成中文是什么意识 翻译一句英语：I don't know how much good it will do. 初二英语`````修改病句I don`t know how to do. 【合并英语句子】.I don't know.HOW old are you?合成I don'tknow_ _ _ _. 合并英语句子.I don't know.HOW old are you?合成I don'tknow_ _ _ _.. 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