Did she be happy?错在哪里请说明理由 为什么用Was she happy?

习惯用Was she happy?

was she happy

陈述句应为She was happy
变为一般疑问句有助动词was直接提前,变为Was she happy?
只有在没有助动词的情况下才能借do、does、did

Is she happy?或者Was she happy?