Not being able to speak at the age of three is generally not normal. Generally at about one year to one and a half years old, young children will begin to speak, but at first often express simple words, with the gradual development of language, will speak complete sentences, at three years old the child can generally speak complete sentences, able to master the basic verbal language, but it is possible to express is not very fluent, if at this time still can not speak is not normal. If the child does not speak at the age of three, he/she may be behind in language development. The first thing to consider is whether it is due to a poor language environment, for example, if he/she is in an environment where there is often no one to communicate with, this may lead to delayed speech. It may also be due to cerebral palsy, which is mostly caused by perinatal ischemia and hypoxia. Parents who are still unable to speak at the age of three should take their children to the hospital to find out the cause and take adjustments or treatments according to the condition.