请问这句话中I have to admit that I am not as good a cook as she is,为什么后面要有这个is呢?不加的话会影响意思和语法吗?

I have to write this arcitle to talk with you.请问这句话中talk之前为什么要加“to”? i know you will have to keep running.请问这句话中每个单词所做的成分是什么成分 I will have to ask my future husband.这句话中have to ask怎么解释? 请问这句话对吗? I always like to play games until i have a child I might have to go to the doctor.请问这句话有错吗. 请问下面这句话有语法错误吗?I have no time to do physical exercises everyday. where have you been these days?I have gone to DaZhu with my friends .请问这句话对不? if i promise not to kill you,can i have a hug?请问这句话出自哪里 .I hope that I still have time to show my best .请问这句话有错误吗.我拿不准.. I often do something that i don't have to 请问一下这句话有语法错误吗?如题 I'm happy to inform you that you have been promoted to captain. 请问这句话是什么从句 I have enough food to supply for some time.这句话中supply的用法对不对? I have lunch at noon .请问这句话对吗 If it hadn’t rained yesterday,I would have been to Su Zhou.请问这句话如何翻译? If it hadn’t rained yesterday,I would have been to Su Zhou.请问这句话如何翻译? Have you gone to beijing?这句话正确的,I have been to beijing.正确.I have gone to beijing. 请问这句话中I have to admit that I am not as good a cook as she is,为什么后面要有这个is呢?不加的话会影响意思和语法吗? I have to excuse myself a moment.May I be excused Permit me to excuse myself.请问这几句话是啥意思呀?