You can make negative sentences similar to the sentences before. The only different is to add NOT after am, is, are, as you can see in the following chart. Follow the list for detailed expressions;
10 Sentences of Modals Should, Examples of Should Sentences
45 Sentences of Should, Example Sentences with Modal Should
Modal Verbs Should Sentences, Examples of Should Sentences
10 Sentences of Verbs, Verbs Examples Sentences
Verb Sentences Examples, 90 Verb Example Sentences
95 Negative Sentences Examples, 95 Negative Sentences Examples
