I think Sarah was meaning exactly the kind of lack of grammar that we find in Joyce's stream of consciousness...or maybe that's how i interpreted the topic... Anyway surely there are many other cases, not only so called 'modernism' where the rules, especially grammar ones, are broken... A couple of questions to Francy, as i dont know much about any of the authors you mentioned:
1- is that Woolf's thing soem kind of 'experiment'? Did you mean she wrote just following her thoughts in a 'psycoanalitic' way, but despite this she was using correct grammar?
2- can't the realism of novels set in the lower classes, be a development of 19th century's realism/positivism? How you described it made me think of Zola...
So basically, the lack of grammar is not only stream of consciousness, and the stream of consciousness is not only lack of grammar... What Joyce made was to eliminate the role of the narrator as a 'filter': you no longer see the character with the eyes of the narrator, but you are in the first row! Much more than with the 'free indirect speech', which Joyce himslef used while he was till experimenting (the example we were given in school was 'Eveline' in Dubliners) as a lot of other authors did in the same period or slightly earlier (late 1800/early 1900)...i have many italians in mind, but also some french ones. A particular novel from this point of view is La Coscienza di Zeno by Italo Svevo (i'm not sure this novel has ever been translated in other languages...if not, wait a few years, let me become a translator and i'll do it!
). It is often compared to Ulysses because it was published in the same period (1923 if my memory doesnt fail) and the author and Joyce were friends (by the way, he's the one who said that Joyce's device let you see the thoughts of the character as if the skull was open...), but the way to let you get 'inside' of the character is totally different: it's a sort of autobiography written thorugh the memories of the protagonist, what is particular is that there is no chronological order but the memories only follow the logical order in which they coem to his mind (and this is the innovation).
As for the modernism, it is said that the need of breaking the rules comes from the particular feeling of insecurity of the man of the early 20th century, disoriented by all the changes the world was undergoing to, for example from the scientific poin of view, and obviously, after the 1st world war by all the changes it had brought in politics and also in the way of life. (insecurity...therefore the need to see directly in the character's mind? if i can say so, the character himslef is more 'true' and trustworthy of the narrator's view...)
From the point of view of the style, it might also be a reaction to the rules and the massive use of realism and 'positivism' of the previous century (some authors tried to be as realistic as possible also in the use of language, for example avoiding metaphors and stuff).
All this brought innovation in many fields, including painting (Picasso...), music (dodecaphonic music, though i dont know anything about it) and saw the birth of literary groups as the Italian futurists, who erased the use of grammar and punctuation (and even 'useless' words like adjectives and adverbs) creating poems that seemed 'lists' of concepts and sounds (through onomathopeic words): one of their myths was the speed... A language that resembles to the language of advertisements of nowadays. Some poets even used the words as parts of a drawing, to creat an art that is not only poetry but also something visual (i'm thinking about that poem about the rain of Apollinaire if i remember right...but i know there were examples in italy too)
Sorry about the length of this (aaargh it seems like a lesson!
), but if i dont talk and talk and talk about literature here, where am i meant to do it? Everybody esle will call a doctor and send me to the mads house! (well, free to do it).
All that i wrote is probably a bit simplifed and superficial, but it's based mainly on school's memory (though i checked the main facts not to say something totally uncorrect).... Fell free to correct me if you see i've said soemthing wrong!