请分析...what it’s like to be faced with

Jameson Slattery, vice president of Global Marketing at Color Science, knows what it’s like to be faced with an overflowing inbox every day.

句子里的 it's 作何解？这边可以省略 it 吗？

Jameson Slattery, vice president of Global Marketing at Color Science, knows what it’s like to be faced with an overflowing inbox every day.

it是形式主语，to be faced with...是不定式作真正主语。因此it不可省略。

what is sth like?中，like是介词，what是介宾，介词短语作表语。名词性从句不倒装，则为what sth is like. 如果不定式作主语，则必须使用形式主语it：what it is like to do sth.本句中，what从句是knows的宾语从句。

基本句型：

What is the weather like in your hometown?

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Jameson Slattery, vice president of Global Marketing at Color Science, knows what it’s like to be faced with an overflowing inbox every day.

句子里的 it's 作何解？这边可以省略 it 吗？

【答】what it’s like to be faced with an overflowing inbox every day，是knows 的宾语从句，如果是单个的特殊问句，就把is 提到it 之前：

What is it like to be faced with an overflowing inbox every day?

to be faced with an overflowing inbox every day 是真正的主语，it是形式主语。句子意思是：

“每天面对一个溢出的收件箱会是个什么样子/什么感觉？”（指邮件太多，应接不暇）

What is it like? 原本是个常用句型。it是人称代词，指代某个事件。但是，如果后面加了动词不定式，it则成了形式主语，不定式是真正的主语。又如：

What is it like to work with Bruce Willis? 和布鲁斯韦利斯一起工作有什么感觉?

What is it like to have lost all confidence in oneself? 一个人完全失去自信是怎样一种情况呢?