I've always been confused on this point.
Also, where do adverbs and the like go? Sindarin has adjectives following the nouns, Quenya has adjectives preceding, but what about the other parts of speech?
Also, Quenya is generally an inflected language but there are listed some prepositions/postpositions. When do you think it's acceptable to use these if there is a case that covers it. I'm specifically thinking of mi 'in.' When might you use mi instead of -sse?
(Poetry would be a good example - it doesn't add or subtract syllables but if you're trying to write alliteration, that may be useful)