General intelligence is essential for outstanding achievement because it involves your natural ability tocomprehend difficult concepts quickly and to analyze them clearly andprecisely.
it指什么？感觉应该是General intelligence。但有人提出it是形式主语。
It 指代General intelligence，不是形式主语。to comprehend... and to analyze这二个不定式为ability的定语。假如有人提出it是形式主语，这个“有人“显然读句子不注意句子表达的逻辑意义，也忽视了ability假如没不定式作定语就没实质意义。你一个人目前疑惑，也说明你对不定式作ability的定语认识模糊。
