1. 我不确定,但我认为这件事还应该多加讨论。 i'm no sure, but i think it needs more discussions
2. 我不太肯定,但我记得期末考试是在下个周一早晨。 i'm no sure, but i remember the final exam is on next monday moring
3. 我不太确定,但我想我们可以跟老板再讲讲价。 i'm no sure, but i think we should discuss the price with the boss