• Noun Clauses: Adjective Complement

• 
• A noun clause can also function as an adjective complement.  An adjective complement is a phrase that modifies an adjective. It follows the adjective in a sentence, offers more information about it, and completes the sentence. 

  
  

  adjective + noun clause

  -I'm surprised that he was hired for the job. 

  -I'm surprised he was hired for the job.*

• I'm disappointed that some 'green' political parties don't care about the environment.	I'm sad that the Western Black Rhinoceros became extinct because of poaching.
  I'm sure carbon dioxide levels in the environment are higher now than 30 years ago.*	It is interesting how biodegradable waste can be used as fertilizer.

• *Remember! The relative pronoun that can be left out when it introduces a noun clause that functions as an adjective complement.

Source : Alison