From what I can tell, Lynn, 'that' is used more frequently in US writing than in UK. In UK English, the sort of construction Yvonne used is very common; eg, if I wrote something like this:
"I know he's having an affair with her. I just know it!"
a US GE would tell me that I need to have 'that' between 'know' and 'he's'. In fact, I've just realised that in UK English construction (ie before my writing became so heavily influenced by writing for a predominantly North American readership) I would have omitted the 'that' in what I typed above after 'US GE': I would just have written:
a US GE would tell me I need to have...
It's a 'short-cut' thing - 'that' is grammatically correct, but we tend to omit it some of the time and, since the meaning is clear without it, it's accepted as okay.
And I just looked up one of my favourite grammar sites, Charles Darling's guide (which I've recommended in this folder before) and found his commentary on
\'that\' omitted , which says pretty much what I thought.
As for that/which, this is an area where UK and US grammar rules do differ. Lynne Truss's Eats, Shoots and Leaves discusses 'that' and 'which', as far as I recall. Charles Darling's grammar guide has a
page on the distinction between that/which. He points out that 'which' can be used for both restrictive and unrestrictive clauses (explanation given on the page!
) but, as far as I know, many US grammarians prefer to use 'that' for unrestrictive clauses, not 'which'. In the UK it's much more common for 'which' to be used for both.
Hope this helps! And do bookmark
Charles Darling\'s site - it's one of the most helpful and user-friendly around.
Wendy