• Negative Noun Clauses as Objects

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• Remember that noun clauses are dependent clauses with a subject and a verb.  In their standard form, noun clauses are affirmative. You can form negative noun clauses with not.  

  
  

  relative pronoun + subject + auxiliary verb + not + base verb

  - Jessica thinks that she cannot sing well.

  
  

  The noun clause that she cannot sing well still functions as a direct object in this sentence.
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• I don't understand why people don't do more to fight global warming.	Harrison didn't know that you can't recycle pizza boxes.
  I hope that we don't ruin the sea turtles' natural  habitat.	Tina said that we shouldn't use plastic bags when we buy groceries because it pollutes the environment.

 Source : Alison