This is called subject-verb agreement . Identify the subject as either plural or singular. Choose a verb that agrees with the subject. Step 1 in achieving subject-verb agreement is to determine if the subject is singular or plural Follow these guidelines to help you make that determination. Examples follow depicting each sentence type.
Natural gas is the cleanest burning of all fossil fuels.
Home heating and water heating are two uses for natural gas. My neighbor and best friend uses natural gas for cooking. Electricity or natural gas can be used for clothes drying. The Smiths and the Jonses are big supporters of using natural gas in the home. The gas company or energy consumers make the difference in our energy future.