I do not know how I should do it next.(改为简单句）

I do not know how to do I do not know how to I'm sorry I do not know how to love I do not know I do not know I do not know how to face yourself and you! If I do not know how good that the翻译 You do not know me,how can i love? 谁知道 I hate you do not know how to love I do not know how it ___.（使用） How do I know you? I really do not know A what to do B how to do c how can i do说明理由 I do not know how I can do it同一句能改为I do not know what I can do.. I do not know how long the river is=I do not know of the river. 请问 I DO NOT KNOW sorry,i do not know! Why I do not know I do not do very ___ in Maths.I want to do better but do not know how.