Other way to say "I think ~"
I know some words to express ones onion, but I'm unsure when you use them.
What are the differences between those words?
Would you give me some example sentences?
If there are more useful expressions, please tell me them too :)
*The reason I asked this question is that in my mother tongue all phrases can be translated in a same word.
So I'm eager to know if there are typical cases in which one ("believe" for example) can be used but another ("suppose") can't be :)