Question

I discovered that the most important requirement was to spea

Answer 1

discover是动词,动词后面个名词或从句,跟从句时应注意”I discovered“是个句子,而且the most important requirement was to speak English well.也是个句子,也就是一个句号连俩个句子,所以要用that 引导形成从句； 句子the most important requirement was to speak English well.中,the most important requirement是主语,to do 不定时引导的to speak English well作宾语,所以说不是说为什么要用was to 而是该句中to 和speak English well是一个整体