That she want to be a doctor is come true 中的that为什么不能省略

wish用法My wish is to be a doctor.为什么不能说my wish is（that)being To be here _____christmas time is a dream that has come true today i want to talk about my dream that is to be a doctor.这 That cat want to be a doctor.一般疑问句、回答.和That cats want to be It's like a dream come true...这句话是省略了（that has)?为什么可以省略呢? 1 That man is not __________ to be a doctor. 1.That man is not __________ to be a doctor. That man is not __________ to be a doctor. Is that true that it's hard to be a person? My parents want me to be a doctor,but I am sure about that.的 To be a doctor is I wanted to be中填all that还是all what, The reason ...is that 中的that能否省略 为什么?