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 and panic attacks. Some episodes of chest pain occur as part of an anxiety or panic attack. In addition to chest pain and overwhelming feelings of anxiety, these attacks can cause symptoms such as heart palpitations, sweating, breathlessness and dizziness. Most panic attacks last for 5 to 20 minutes. In the long-term, you may benefit from psychological therapy and medication, or both.