だろう！? だと思う ?

[shizakura]

Hello

I have the problem, that I don't really understand the usage of だろう

For example:


has 『いつまでも一人なんだろう』

the same meaning as 『いつまでも一人でいると思う』 ???

when I look in the dictionary, だろう is translated as "I think it is"

so, I can use it instead of だと思う ?

 

[Glenn]

だろう is closer to "probably" than "I think".

 

[tatuyahosi]

hello.
A fundamental difference between "～だろう！？" and " ～だと思う？" is a context that these phrases are used.
1. ～だろう！？ ,for example

・お前は寿司（sushi)が好きなんだろう？ （confirm a fact . In this case,a person who asks this question
is not sure whether he/she likes sushi.)

* By adding a exclamation mark,it will be a interrogation. it is often employed when a person is angry.

2,～だと思う？
・it is translated as a very simple sentence "Do you think that ～？".