The English subjunctive may well be dying, but I am shedding no tears for it. This unconcern is, perhaps, a minority view amongst men of letters, for whom saying if I were instead of if I was is often a marker of a proper education, but I’m comforted by the fact that it is the majority view amongst users of English.
The subjunctive, if you’re not familiar with it, is a verbal mood* that appears in a variety of languages. It’s prominent in Romance languages (if you’ve taken French or Spanish, you’ve surely encountered it), and it exists to various extents in other Indo-European languages as well, including English. The basic idea of the subjunctive mood is that it expresses something counter to reality. For instance, one might say:
(1) If Alicia were the President, she’d get Party Down back on the air.
Normally, you’d say “Alicia was”; “Alicia were” would be a misconjugation. But because we’re talking about a counterfactual situation (Alicia is not really the president), we can use the subjunctive mood instead. And in the subjunctive mood, the present tense of the verb to be is were, regardless of the subject.
Often you’ll see people using the regular present tense in these situations, writing in (1) “if Alicia was the President”. That’s because the English subjunctive is pretty weak. It can be used in counterfactual situations, but it generally isn’t required. Because it’s optional and subtle (it looks just like the plural indicative forms of most verbs), it’s no surprise it’s disappearing.
Many grammarians wail and gnash teeth for this loss, and try to explain how important the subjunctive is.** Some explain that the subjunctive stresses the counterfactual nature of the situation, as though if you saw “if Alicia was president” in (1), you’d be thinking “I don’t know Alicia was president!”. Of course no one thinks this, because the counterfactuality is already established by the use of if.
What’s interesting to me, though, is that are some situations where the subjunctive is obligatory. And I say obligatory here meaning that I don’t get the right meaning out of the sentence if the subjunctive isn’t used. One occurred to me during a little monologue I was having in my head as I walked across campus the other day:
(2a) He’s obsessed with the idea that everybody admire him.
(2b) He’s obsessed with the idea that everybody admires him.
In (2a), with the subjunctive, our nameless character hopes that everybody admires him, suggesting a dearth of self-esteem. In (2b), with the indicative, our nameless character believes that everybody admires him, suggesting an overabundance of self-esteem.*** Here’s another one that just came to me, and here not using the subjunctive seems very awkward (although I’ve found examples of it in the corpus):
(3a) I require that it be done tomorrow
(3b) ?I require that it is done tomorrow
So, you might say, how can I idly declare the subjunctive on its way out while I also declare its necessity? Well, quite simply, if it disappears, we’ll do something else. In the case of (3b), it seems that this indicative form is gaining traction. As for (2a), by just changing the word idea to hope or desire, we get the same irrealis reading as (2a) without requiring the subjunctive. When language change happens, it doesn’t become impossible to say something. It just becomes impossible to say it the old way.
The worst case scenario is that the meanings of (2a) and (2b) get said the same way (with the indicative form admires), that they become a little bit ambiguous, and that we have to rely on context to tell them apart. Even that isn’t a bad situation, since we already do that with so many other things in language. The difference is critical in our current form of English, but it probably won’t be in future forms.
*: The subjunctive is properly called a mood, not a tense, because it exists across tenses; there are past, present, and future subjunctives. This Wikipedia article has some good info on this. The “standard” mood of English is known as the indicative, because it indicates what is really there.
**: I’m especially fond of the Academy of Contemporary English’s thoughts on the matter: “[Not using the subjunctive forms] is so common, in fact, that few people realise that they are using bad English when they mix them up. The difference is of the utmost importance [...]“
NB: when only a few people notice a language distinction, it is not important, let alone of the utmost importance.
***: I won’t spoil the minor mystery by revealing which of the two I was actually thinking.