Choosing between "of" and "off"

[Brigitta]

I always get confused when choosing between of and off. Is there a set rule to be applied?

[Ralf]

Hi Brigitta,

And welcome to english-test! of is a preposition, and off can be a preposition or an adverb. One could think of a thousand different ways of usage, so you're probably best off clicking on those two words here, and you will find out for yourself.

Please ask if you still need clarification!

Take care,

Ralf
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[Brigitta]

Almost getting it... If both forms are prepositions, how do you know which one to use when??

[Ralf]

'of' is usually used when the genitive is needed: 'an island of Spain' (that belongs to Spain)

'off' can be used in several contexts, i.e. 'an island off the coast of Spain' (away from the coast)
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[Brigitta]

Thanks a lot; you've been a great help! Chrs.

[Nola]

Hi Brigitta,
Also don't forget the difference between the sounds of both of them.
(Off) the double 'f" is pronounced as /-f/ consonant sound.
(Of) the letter 'f' is pronounced as /-v/ consonant sound.

Regards
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Nola

[Runs1215]

i do have similar doubt... i don't know when to use 'off'..

i heard people saying "The restaurant is just off London Road", in this case, does it mean the restaurant is just 'next to' London Road? or it is actually in London Road? or how should I interpret this sentence?

[Ralf]

Hi,

It's probably in a side street just off London Road. It works similar to 'an island off the coast of Spain' (away from the coast).
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