Sugar is uncountable; therefore, the sentence has a singular verb. Marbles are countable; therefore, the sentence has a plural verb. 3. Compound subjects joined by and are always plural. 4. With compound subjects joined by or/nor, the verb agrees with the subject nearer to it.
Panic disorder causes panic attacks spontaneous feelings of anxiety, terror, or impending doom. Physical symptoms include heart palpitations, chest pain, and shortness of breath. These attacks may be repeated at any time. People with any type of anxiety disorder may have panic attacks.
The symptoms of anxiety fall into two categories: emotional and physical. Many of these symptoms are the same issues you would experience if you had a serious health problem. For example, anxiety can cause chest pains, but so can heart disease. That's why it's still important to visit a doctor and just make sure that you're in good health.