my friend that is learning english is always saying this when I say something excitedly like "we are going to have so much fun this weekend!"....he will say "I guess so." And then when I get upset he doesn't understand why. I don't know how to explain to him that in English this is a pretty vague, negative response. Is there a response like this in Spanish that has the same negative effect?? is it the verb suponer?? because I think that he thinks hes using adivinar or predecir...but it doesn't work that way in English. When someone says I guess so when I say "we are going to have fun" I am sad. Is there that kind of iffy,maybe...type of an answer in spanish?