sentences:  In his model,
  
  Kachru bases his model on the history of how English spread in different countries, how users acquire English, and the range of uses English has in each country.The three circles change membership over time.Countries with large communities of native speakers of English (the inner circle) include Britain, the United States, Australia, Canada, Ireland, and New Zealand, where the majority speaks English, and South Africa, where a significant minority speaks English.