该句是否是宾语从句I think that your brother is a clever boy.

该句是否是宾语从句I think that your brother is a clever boy.
该句是否是宾语从句
I think that your brother is a clever boy.

该句是否是宾语从句I think that your brother is a clever boy.
that your brother is a clever boy 这个是think 的宾语从句

是的。

这句是宾语从句，因为宾语就是your brother is a clever boy 这件事，而且这已经是一个完整的句子了