i don't know how I do对么

问题描述:

i don't know how I do对么
how不是必须加宾语么?
那书上怎么有句话是the facts about how they live and grow are as...........

注:how to do+其他=how i shuld do +其它!另外、课文中的那句话中they live and grow是主语从句、在句子做主语、然后后面的谓语动词are就可以解释了,至于宾语,则是as后的内容.所以这句话是加宾语了!