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.
There are so many different ways that people experience physical anxiety, and so many ways people describe the symptoms, that an all inclusive list is impossible. For instance, it's a common anxiety attack symptom to feel some kind of tingling or numbness in your extremities, such as toes, fingers, and scalp.