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.
If you've ever had a panic attack, you're familiar with the way your hands get clammy, you can't catch your breath â and your heart feels like it's going to pound right out of your chest. But problems with your heart can also be the cause of anxiety. In fact, after a heart attack or heart surgery, about one-third of people experience anxiety symptoms such as heart palpitations and shortness of breath. These symptoms often last up to one year or more, and they're more common in women.