我不是很肯定英语

我不是很确定：I'm not sure.

Though I'm not sure about my direction, I hope I could go further.

我不是很确定.英文口语I'm not sure.

I want to ask you a question before my talk.where do you want to go best during holiday?Today i wii show you a beautiful place.

看来你要做演讲啊。以下是我自己翻译的，仅供参考1)Before my speech,I would like to ask you a question.2)What kind of places will you prefer to go on vacations？3)Today,I would like to introduce you a fairy-tale place.

I'm not so sure.

比较口语化的有:Definitely!当然!I'm sure!(我)很肯定;当然Sure!当然Certainly!当然!I'm quite sure...我很肯定...Comfirm 意思是确认,比较正式的,比较官方,多用于军事,政治方面

I can not Firmly decide my direction.But I wish i could go further.（绝对是自己翻译的没有利用任何翻译工具，认真地查阅过资料应该没有语法错误）