What is true of language development by the time children start school?

children have learned the structure of their native language can use about 2500 words.

children can form short sentences consisting of basic vocabulary, e. g., dog bark.

children know most of the vocabulary they need; they just need to be taught the structure of language.

children's language development moves in cycles, like their emotional development.

Children can form short sentences consisting of basic vocabulary, e.g., Dog bark.

Explanation:

During the pre-school years at around 3-4 years, children can form around 1500 words. They usually construct short sentences joined by around 3-4 words.

They use sentences to convey their needs or tell about something. They begin to relate to past events. They can use connectors like ‘and’, pronouns, 3rd person usage in their sentences.

They can refer to position, quantity and size and can pose questions with words like why, how, whom etc.  

The narratives during this stage can be just heaps of words like doggy barking; chains of small sentences, like my big brother’s name is Peter, my father’s name is John; primitive narratives centered around a particular theme, like, my papa’s car is big, it is white color.