By the age of three the child is able to quickly learn new words and can follow two-part instructions. They are able to start using the plural in their language and forming short, complete sentences. Although the child may not be able to speak clearly, he can often be understood by his family. These days why and what are the most popular questions. When the child reaches four years of age he is able to use longer sentences and describe an event. I am also able to understand how things are different. I can distinguish the differences between children and adults. At the age of five the child is able to hold a conversation with another adult. Most of their words can be understood and they are able to speak multiple sentences at once. A child will still have language development that began at age five. The age from birth to five years is the most important for language