Differences between spoken and written English
Students need to see the difference between spoken and written English.
1. Permanence
4. Detachment
The writing of a text is detached in time and space from its reading; the writer normally works alone, and may not be acquainted with his or her readers. Speaking usually takes place in immediate interaction with known listeners, with the availability of immediate feedback.
5. Organization
A written text is usually organized and carefully formulated, since its composer has time and opportunity to edit it before making it available for reading. A speaker is improvising as he or she speaks: ongoing alterations, in the shape of glosses, self-corrections and so on produce an apparently disorganized 'stream-of-consciousness' kind of discourse. Thus a written text conforms more to conventional rules of grammar, and its vocabulary is more precise and formal.
6. Slowness of production, speed of reception
Writing is much slower than speaking. On the other hand, we can usually read a piece of text and understand it much faster than we can take in the same text if we listen while someone reads it aloud to us.
7. Standard language
Writing normally uses a generally acceptable standard variety of the language, whereas speech may sometimes be in a regional or other limited-context dialect. In some languages (Chinese, for example), the various spoken dialects may even be mutually incomprehensible, while the written language is universally understood.
8. A learnt skill
Most people acquire the spoken language (at least of their own mother tongue) intuitively, whereas the written form is in most cases deliberately taught and learned.
9. Sheer amount and importance
Spoken texts are far longer, normally (in the sense that they contain more words), than a representation of the same information in writing. It is also, I think, true to say that most people speak far more than they write. Associated with this point is a third: that speech is more important for survival and effective functioning in society than writing is.