Can anyone could put in context the use of the -D|r -T|r suffix for emphasis or disambiguation? For instance, in this case, would this be emphasizing that the elephants are BIG (reaaaally big?) What it would be the difference between "Filler büyüktür." and "Filler büyük" ? Thanks
no no no never that kind of emphasis (reaaaaally big). Here it is a general statement, general, encyclopedic knowledge. For example for "Blood is red" kan kırmızı sounds really wrong, it should be "kan kırmızıdır". On the other hand for "my dress is red" "elbisem kırmızıdır" sounds funny, it should be "elbisem kırmızı"
If you say "filler büyük" I would assume you talk about a specific group of elephants (the elephants are big)
I believe so. That suffix is used when there's some kind of ambiguity as to the subject noun. So if you use possessive pronouns like "benim", determiners like "bu" and "bunlar", or if the subject is definite (when you'd use "the" in English), you would not use that suffix. Pretty much you'd use it if you're not being specific about the subject, but talking about something in general. I might be wrong though; Turkish isn't my native language.
Filler büyüktür.; Why is "The elephants are big." wrong answer here?
Well I am very much a beginner, but from the comments I understood that -tür is added only when talking in general, ex: elephants are big. When you want to talk about a specific group or object, ex: the elephants are big, you take out the -tür. :D
filler büyük = the elephants are big filler büyüktür = elephants are big