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.
Anxiety-especially panic attacks and severe anxiety reactions-overwhelm the brain. They can cause severe physical and emotional responses, and in some cases it may feel as though your brain is firing on all ends. One of the worries that people have is that their anxiety is causing a seizure.