- "It is almost 6 o'clock."
- "I think it is almost 6 o'clock."
The answer is Sentence 2.The pre-final ending -겠 is used to express either one's conjecture or one's volition. If you use it to talk about someone or something else, you are expressing conjecture. If you use it to talk about yourself, you are expressing volition.
In the sentence, "곧 여섯 시가 되겠다," the speaker is talking about "the time," not about him- or herself, which means the speaker is using -겠 to express conjecture. In other words, the speaker is simply guessing (conjecture) at the time. If the speaker had known the time, he should have said one of the following:
- 곧 여섯 시가 된다.
- 곧 여섯 시가 될 것이다.