This question comes up routinely on Dreamweaver courses. Thanks to my much thumbed copy of Partridge’s Usage and Abusage (Penguin Reference Books) I can report that:
- enquire, enquiry – a simple request for information
- inquiry – a formal investigation
- aggravate – to intensify, not to annoy
- agenda – single part of an agenda is an item (although on Yes Minister, Bernard says Agendum)
- prepositions at end of sentences – they are OK
- its = of it
- it’s = it is
There is also about four pages on vagaries of the genitive. For you and me – its about where to put the apostrophe in the dog’s collars, the dogs’ collars and Julius’ collars. Usage and Abusage even has some notes about how to do “about X pages”.
I checked “For you and me” too.
Jargon gets five pages – you should also see The Complete Plain Words (Reference Books) by Sir Ernest Gowers
A useful resource for your bookshelf.
On Line Style Resource
I am going to go with the ABC Radio National Style guide here
Just bring this back to the original point the RN guide agrees with Usage & Abusage on Enquiry vs Inquiry!
For Unreliable Style Advice