When is grammar acquired?

There is no one answer to this question, as the acquisition of grammar is a complex process that varies from individual to individual. Some linguists believe that grammar is largely innate, while others believe that it is learned through experience. It is likely that both nature and nurture play a role in the development of grammar.

However, some general milestones in the acquisition of grammar in English-speaking children include:

* Birth to 12 months: Infants begin to babble, which helps them to develop the muscles and skills they need to speak. They also start to learn some basic words and phrases.

* 12 to 24 months: Toddlers begin to combine words into short phrases, such as "Mama ball" or "Daddy car." They also start to use verbs, such as "put" and "go."

* 24 to 36 months: Preschoolers begin to use more complex sentences, such as "I want to play with the ball" or "Daddy went to the store." They also start to use pronouns, such as "I," "you," and "he."

* 36 to 48 months: Kindergarteners continue to develop their grammar skills, and they start to use more complex sentence structures, such as compound and complex sentences. They also start to use more sophisticated vocabulary.

While these are some general milestones in the acquisition of English grammar, it is important to remember that not all children follow this exact same path. Some children may learn grammar more quickly or more slowly than others, and there is no right or wrong way to do so.