各位大佬，为什么what is in their stockings为什么不用从句形式？

• The small children don't know what is in their stockings
• the boy dont know what is in their stockings和
• The small children don't know(what is in their stockings).
• 分析：The small children don't know what is in their stockings.

The small children don't know what is in their stockings

宾语从句的语序是陈述句语序，即“连接词＋主语＋谓语＋其他”。这里特别强调的是，它的主语和谓语的语序是陈述句的语序，不是疑问句的倒装语序。

连接词＋谓语。连接词在从句中作主语。常见的连接词有： who，what，which等。如：

Could you tell me who knows the answer，please？你能告诉我谁知道答案吗？

The small children don't know what is in their stockings．这些小孩子不知道袜子里有什么东西？

the boy dont know what is in their stockings和

don’t know 后面是一宾语从句，what 是主语，is 是系动词 , in their stockings 是介词短语作表语，所以正确。

The small children don't know(what is in their stockings).

不能放在句末呀，in their stockings 在他们的长筒袜里

这是一具宾语从句，WHAT 是引导词，也是从句的主语）

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分析：The small children don't know what is in their stockings.

没有问题，what是充当从句的主语，当然放在最前面，后面跟系动词is，正常的陈述语序。