Normally a child is around 1 year old, the beginning of language. At this time, you will find that your baby can understand much more than he knows, except for mommy and daddy and some single words idioms, so at this time your baby may be able to complete some simple instructions and will use his hands to point to objects or people he knows around him. The baby may often use one word to express multiple meanings, and can complete simple instructions quite well, even pointing out irrelevant ones. 12-18 month olds will use words that generally have about 20 words. 18-24 month olds will use words to form sentences that generally have hundreds of words. 24-36 month olds will communicate in sentences and can express their emotions, intentions The child will be able to say his or her name, age, gender, and name common objects, as well as complete two or three consecutive commands. after 3 years of age the baby will have spatial orientation nouns, time nouns, and pronouns. at 4-5 years of age the child will be able to say compound sentences. Generally 7-24 months old is the critical period for language comprehension, and 2-3 years old is the critical period for oral expression, so pay attention to this period of oral expression. When a child is 2-3 years old, it is the language explosion period, the baby’s language progress is particularly fast, can use more complex sentences to communicate, and especially like to ask questions, as long as a talk may not stop, many children at this time treat language is like getting a beloved toy, talk up and keep talking, and even keep asking questions. In reality, parents must treat their children correctly at this time, to understand that this is a manifestation of brain development, indicating that the baby’s thinking ability and cognitive desire to improve. Be patient and answer your baby’s questions, don’t get annoyed, otherwise you will discourage your baby’s desire to talk. After the age of 3, the baby’s pronunciation is basically accurate and can self-correct some grammatical errors from the interaction with adults to form a normal language, which will not cause some obstacles in the communication process.