你好，我想请教Almost as many boys reported dieting as girls and many of the children surveyed said they were already dissatisfied with their body shape.中as many boys reported dieting as girls是什么成分？还有这里的reported是后置定语还是什么呢？谢谢你！

Almost as many boys reported dieting as girls 这是并列分句之一。

Almost as many boys主语 reported谓语动词 dieting宾语 as girls 比较状语从句。

reported为一般过去时作谓语。