One of the ways a language is learned, especially a foreign language, is by personal extensive reading. When people read widely, they are exposed to the linguistic structure of what they read and so learn it consciously or unconsciously. What they come across in their reading remains in their minds and adds to their general knowledge. This includes knowledge of the language they read. General wide reading reinforces the language students have been formally taught in their language classes. Exposure to grammatically correct language would improve their language skills. On the other hand, exposure to incorrect language would negatively affect the language skills of foreign learners and cause them to use wrong language comfortably, not knowing that they are erroneous in their usage.