Language involves signs, sounds, and often written forms. Language changes, as all living things do. Changes in language are one kind of social change.
Young children communicate on the level of deep structure before mastering the surface structures.
The grammar needed for these activities is acquired by plentiful experience of the desired language, not by theoretical instruction. However, a good grounding in both grammar and theory helps teachers to prepare language experiences that will be effective in producing good language skills. Outline the section with the greatest number of new terms, so that you can more readily grasp their relationships.