Let's Learn About Noun Clause

NOUN CLAUSE
A Noun Clause is a group of words which contains a subject and a predicate of its own and does the work of a noun. In other words, a noun clause is used in the same ways as a noun.
A. I wished to go to Chicago.
B. I wished that I would go to Chicago.
Let’s see, ‘go to Chicago’ in sentence A doesn’t have subject and predicate. ‘go to Chicago’ is functioning as a noun only.
In sentence B, the group of words ‘that I would go to Chicago’ has a subject (refer to ‘I’) and predicate (refer to ‘go’). But this group of words also has function as a noun. Since this group used as a noun and a clause (for being an object for verb ‘go’), therefore it is what we calls Noun Clause.
Examples:
- He afraid he would get hit.
- What they said saddened me.
- Nobody knows where she lives.
- I wonder what the package is.
- I think Doug would get surprised.

I just learned it from http://www.english-for-students.com/Noun-Clause.html
Please be free to learn :D