The concept of acquisition is recognised for obtain the language, though the term of learning is used for the same notion often. Even they are different in their meaning and sense, but the term of acquisition is more academic and appropriate than the term of learning. This term is mostly used for the first language which its meaning is different of learning if we think about it in term of the first language compare to the second language. When the children acquired their first language, they achieved the completed grammar or the rules (competence) of their mother tongue. Once some people desire to learn the second or another language, the completed systems of the grammar that they obtained have a great influence of the acquiring the second language. This paper is about that effect and it will be more clarified in detail in the context. This topic is really significant in the modern world because a lot of people wish to learn another languages, that each one has a factor of acquiring second language such as business, study, technology, science, travel, and work opportunity.