How does a child learn his mother tongue?

Starting to speak for a child is based on the growth of his organs of speech. As a result, during his first six months of life, a baby just babbles some meaningless sounds; then, little by little, the baby will be able to imitate the others' sounds and produces some tones. Next, about the end of his first year, the baby tries to imitate exactly some specific sounds that he hears. At the beginning of his fortieth week, the baby put his attempt to intimate the words that his mother uses. These attempts are increased until he will be able to produce words, the more the baby observes the thing that he hears its name, the faster he will switch from imitation to real speaking. The primitive word that he learns is a noun or a single syllable that he will repeat it later, like mama or papa. Usually, combining the words with together in order to make a sentence occurs before the end of two years old. His first sentence is a word that is completed with his gestures. Then, after eighteen months, he combines two or more words to make a sentence but it is still incomplete, for example "mama give water!". Following that, in his fourth year, he makes correct and complete sentences. When he is five, he is able to make complete sentences which are almost grammatically correct. And finally, in his sixth year he makes perfect sentences. After that, till the age of ten, he increases the length of his sentences and after this period, the length of them remains fixed or decreases. Finally, at this point a child is able to speak his mother tongue fluently and thoroughly.

Tahereh Zareie