问一个英语句子句型,是并列宾语从句还是什么?

问题描述:

问一个英语句子句型,是并列宾语从句还是什么?
Since food is vital ,we need to know the nutritive content of foods,which ones are the best sources of the various nutrients,and how to combine them into a healthful diet.该句中 how to combine them into a healthful diet是不是宾语从句?如果是宾语从句的话,那how to是做宾语中的什么的?

how to.不是宾语从句,是特殊疑问词加不定时结构,翻译成怎样去做某事,是一种特殊用法