Definition
I'm not so sure about that: I am not convinced, I do not agree
Edward Moon - the best singer in the world? I'm not so sure about that!
Still unsure of the best way to use 'I'm not so sure about that'? Improve your English thanks to our online English lessons. We offer a free test as well as a free level assessment!
What our users say:
Test your English with Gymglish today and get a free level assessment
Absolutely free - no strings attached.