Here's why:
* Spoken language is more fluid: We speak in real time, with pauses, hesitations, and changes in tone that add meaning. Written language is more static, relying on punctuation and sentence structure.
* Spoken language is less formal: We use slang, contractions, and less precise grammar in casual conversation. Written language often requires more formality and clarity.
* Different dialects exist: Someone from the Southern US might speak with a different dialect than someone from New England. However, written English is generally more standardized, though different styles exist.
So, while the foundation of spoken and written language is the same (words, grammar, etc.), the way we use them differs significantly.
Think of it like this: you can speak and write English, but the way you communicate in a casual conversation will be different from writing a formal essay.
It's also worth noting that some languages have more differences between their spoken and written forms than others. For example, Chinese has a very different writing system compared to how it's spoken.
Let me know if you'd like to explore this further with specific examples!