提问一个有关宾语从句的问题（给出原文讲解，看看对不对）

原文：
“当宾语从句为特殊疑问句时，主句的谓语为动词think、believe、consider、supposed、imagine、guess、SAY、suggest及形容词afraid、sure、glad、certain、surprised、pleased等时，语序为‘特殊疑问词+倒装从句+陈述语序的宾从’。”
例：What is he doing？
-》What do you think he is doing?
例：Whay would cause his failure?
-> What was he afraid of would cause his failure?

问：两个宾从是同一类句子吗？
问：第二句话的句子结构？怎么体现为宾从？
问：第二个句子是不是主语从句少宾语？

1.两个句子都是宾从，结构一样，都是作宾语的疑问代词what被提前 2.第二句话改成what he was afraid of才算是一个主语从句，因为所有的what引导的从句都是陈述语序。而例中这句是宾语从句。可能还原成陈述句比较好理解吧：He was afraid of sth. that(前有不定代词，所以that不可省！）caused his failure.把这句话改成疑问句就成了你问的那个了。＊afraid of 后加what 指代的宾语，形成介宾结构，把what caused his failure看作一个整体，即全句的宾语，这句宾语从句就是按照主谓的顺序来的，跟第一句you think what he's doing一样。3.容易引起误导的是what was he afraid of，不过我前面讲了，这并不是一个从句，是疑问句。