That sentence is fine as it is, but if you wanted to be super grammatical about it, it would read, "I'm not sure whether or not I understand this correctly." You can also totally rephrase it to …

【ネイティブが回答】「I'm not sure about it」ってどういう意味？質問に1件の回答が集まっています！Hinativeでは"英語（イギリス）"や外国語の勉強で気になったことを、ネイティブス …

Definition of I'm not sure 'I'm not sure' is another variation of "I don't know" Sure - meaning yes, to confirm, or to be certain. With 'I'm not sure' you are saying you are not certain of the answer to …

If we don't have confidence, we say 'It is not sure.' formally, 'I don't clearly understand.' or 'I don't understand a bit.' when speaking. A: What time will you be back? B: Not sure. I'll give you a …

" I'm not sure that" is used when expressing uncertainty or pointing directly to a certain situation, person, object. I'm not sure that I'm the right person for it.

【ネイティブが回答】「"i'm not sure if" and "i'm not...」を使った自然な例文を知りたい！14件の日常で使える回答が集まっています！Hinativeでは"英語（アメリカ）"や外国語の勉強で気 …

【ネイティブ回答】「I'm not...」と「I guess...」はどう違うの？質問に4件の回答が集まっています！Hinativeでは"英語（アメリカ）"や外国語の勉強で気になったことを、ネイティブス …

Synonym for I'm not sure They are both interchangeable, but "I'm not sure" can be used on its own. "Are you going to the party?" "I'm not sure." "I'm unsure" doesn't sound as natural by itself.

I'm not sure. 和 I can't be sure. 的差別在哪裡？ 如果不好說明，請提供一些例句。 The owner of it will not be notified. Only the user who asked this question will see who disagreed with this …

I'm not sure that they let me to take part in the competition. |I'm not sure if it will fit in a bag.|I'm not sure that you will finish it in time.|if it's going to.. if that is working, or not sure that if this is--this …