Further vs Farther - English Grammar - Teaching Tips
The two words "farther" and "further" are a pair of words that is often used interchangeably to talk about distances. However, not many know that there is actually a slight difference between the two. "Farther" is used for physical distances. So we would use it in this example: "Tokyo is farther away than Beijing". When using "further" we talk about non-physical, figurative distances, for example "I'm falling further away from my goals". As you can see, the two words have slighty different usages. However, in spoken English the two words are often used interchangeably without a difference. However, if you are keen to use them properly, you should stick to the rules mentioned above.
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