Grammar is the name we give to the rules of language. It helps us to use words to form sentences so that we can be understood. The basic rules of grammar help us to build sentences in a way that makes sense to other people. Understanding and using correct grammar is a vital tool to language development. These grammar rules give us guidelines in order to put words together in a proper sequence and use them correctly. Putting words in the wrong order can change the meaning of a sentence and cause confusion. An example might be: Henry ate the fish for dinner. The fish ate Henry for dinner.