Common nouns are all other nouns which represent people, places, or things. Your intended meaning determines the article you should use with the noun. Thus, they do not have plural forms. Blood is thicker than water .
Depression often affects women immediately following the birth of their babies.
During the flood, some water damaged our carpet. The monies were transferred yesterday. Some foods have been declared unsafe. The teacher has an honesty that all of her students appreciate. One pencil and one eraser are in the drawer.