问一道SAT语法题,英语厉害的炒鸡大侠帮帮忙吧!）

问一道SAT语法题,英语厉害的炒鸡大侠帮帮忙吧!）
Historically,fewer than twenty percent of the pop songs identified by music executives as likely to be hits have performed as expected.
句子的主干是fewer than twenty percent of the pop songs have performed as expected.
我想问的是那个定语部分：“ identified by music executives as likely to be hits ” 就等于“ which were identified by music executives as likely to be hits.” 关键是里面那个“as likely to be hits,如果换成” to be hits“我明白,但是 这个”as likely to be hits我就不明白了,它是个什么结构或者什么用法,
这是北美卷的语法题，这道题选的是NO ERROR，所以我想弄清楚他到底是什么结构。

dentified by music executives as likely to be hits可以直接把 by music executives排除在外,就是句子变成了dentified as likely to be hits.句子就是be identified 后面再接as （相当于连词）,连接后面（they are）likely to be hits.我认为不是be identified as这个固定词组,因为这个后面一般加的是名词.应该是be identified 后面加 as的从句.不知道你明白没?
再问： 对我觉得你说的很有道理，表示可能都会用“be likely to”，但是不是只用在从句中才能将与主句相同的主语和主语的be动词同时省略么，像你说的be identified as后面接的是个从句，但是我不知道是不是有这种样子的从句形式? 谢谢！