
Originally Posted by
fivejedjon
One day they will want to know who this is. When they find out that he is an unknown person, one of several who post answers on an internet forum, even if it is a respected one, they are not going to be too impressed. It would be nice to think that I was the first to come up with this idea, but that is simply not the case. Indeed, the idea of three (or four/five) numbered main types of conditionals seems to be found mainly in course books and fairly basic grammars. It is a simplification which some learners and less experienced teachers find helpful, but few serious grammarians present it, as you see:
R A Close (1992 - original work, 1962) groups conditional sentences according to whether they assume a fact or imagine non-fact to be actual fact.
Close, R A (1992) A Teacher’s Grammar, Hove: LTP
Sylvia Chalker (1984) notes; "A common simplification is to say that there are three types of conditional clauses [...] but this arbitrariliy suggests that all other tense combinations are exceptions, which they are not".
Chalker, Sylvia (1984) Current English Grammar, London: Macmillan
Quirk et al discuss (1985) direct conditions, open and hypothetical, indirect conditions and rhetorical conditional clauses and (1972) real and unreal conditions. They look at a number of possible tense/aspect and modal combinations without making any attempt to fit them into 'first, second, third conditional' classes.
Quirk, Randolph, Greenbaum, Sidney, Leech, Geoffrey and Svartik, Jan (1985) A Comprehensive Grammar of the English Language, London: Longman
Quirk et al (1972) A Grammar of Contemporary English, London: Longman
Sinlair et al (1990) note: "Foreign learners are often taught that there are three kinds of conditional sentences [...] This is largely correct, but does not fully describe the normal patterns of tense in conditional clauses."
Sinclair, John (Editor-in-Chief), (1990) Collins Cobuild English Grammar, London: HarperCollins
George Yule (1998) looks at conditionals under the headings real conditionals, factual and predictive, and unreal conditionals, hypothetical and counterfactual.
Yule, George (1998) Explaining English Grammar, Oxford: OUP
Martin Parrott (200) notes: "Some people argue strongly that we should avoid using the term conditional and that we should avoid the four basic types; we can expect to see course materials that reflect their views".
Parrot, Martin (2000) Grammar for English Language Teachers, Cambridge: CUP
Huddleston and Pullum (2002) consider a wide range of tense/aspect and modal combinations and their meanings under the broad headings of open and remote conditional constructions. No first, second or third conditionals for them.
Huddleston, Rodney & Pullum, Geoffrey K (2002) The Cambridge Grammar of the English Language, Cambridge: CUP
Carter and McCarthy (2006) discuss the first second and third conditionals, but then add, "Many conditional clauses occur in these structures, but there are several other possible structures",
Carter, Ronald & McCarthy, Michael (2006) Cambridge Grammar of English, Cambridge: CUP