What has become obvious to me when it comes to the income gap is that there needs to be an opportunity for the people at the bottom to push them back up and push them into the middle-class to give them hope in their lives.
主句，由主语从句 + 系动词 + 表语从句构成主系表结构，表达说话者对收入差距问题的认知和主张
成分推断 · 3 项
谓语 is
- 先找全句的主要动词。开头 "What has become obvious" 中有 "has become"，但这是主语从句内部的谓语，不是主句谓语。
- 继续向后，在 "when it comes to the income gap" 之后看到 "is"，这是一个系动词。
- 检查 "is" 前后的结构：前面 "What has become obvious to me when it comes to the income gap" 整体作主语，"is" 后面跟 "that there needs to be..." 引导的从句作表语。
- 因此 "is" 是连接主语和表语的系动词，是主句的谓语。
主语 What has become obvious to me when it comes to the income gap
- 系动词 "is" 前面的部分应该是主语。向前看，从句首开始到 "is" 之前的整个部分是 "What has become obvious to me when it comes to the income gap"。
- 这个部分由 "What" 引导，"What" 在此处不是疑问句，而是引导一个名词性从句作主语。
- 检查这个从句的完整性："What"（主语）+ "has become"（谓语）+ "obvious"（表语）+ "to me"（状语）+ "when it comes to the income gap"（嵌套的时间状语从句）构成完整结构。
- 因此整个 "What has become obvious to me when it comes to the income gap" 是一个主语从句，在主句中充当主语。
表语 that there needs to be an opportunity for the people at the bottom to push them back up and push them into the middle-class to give them hope in their lives
- 系动词 "is" 后面需要接表语。向后看，紧接着是 "that there needs to be an opportunity..."。
- "that" 在此处引导一个从句，由于它位于系动词 "is" 之后，这个从句作表语，称为表语从句。
- 检查 "that" 从句的完整性："there needs to be"（存在句结构的谓语）+ "an opportunity"（主语）+ 后续的不定式短语作定语和状语，构成完整的从句结构。
- 因此整个 "that there needs to be an opportunity for the people at the bottom to push them back up and push them into the middle-class to give them hope in their lives" 是表语从句，在主句中充当表语。
时态 · 语态 · 语气
时态 一般现在时
语态 主系表(不适用)
语气 陈述语气
判定依据
- 时态判定：先看主句谓语 "is"。这是 be 动词的第三人称单数现在时形式，没有助动词 "have/has/had"（完成体标志）、"will/shall"（将来时标志）或进行体标志 "being"。因此时态为一般现在时。
- 语态判定：主句谓语是系动词 "is"，连接主语和表语，构成主系表结构。系动词本身不涉及主动或被动的概念，因此语态不适用。
- 语气判定：全句是陈述句，谓语 "is" 是直陈语气的现在时形式，没有虚拟语气标志（如 "were"、"should" 等），也不是祈使句。因此语气为陈述语气。
语义说明 一般现在时在此处表达说话者当前的认知和看法，"is" 说明这个观点在说话时成立，是对现状的陈述。