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.
Physical symptoms of anxiety include shortness of breath, muscle tension, a fast heartbeat and dizziness. Anxiety manifestations also include nausea, irritability, trouble sleeping, difficulty concentrating, trouble breathing and trembling. Anxiety occurs when the chemicals located in your brain (neurotransmitters) are decreased.