Use 'to be sure' to emphasize that what you're saying is true and remove any doubt.

Emphasizing Truth

'To be sure' is informal and often used in casual conversation rather than formal writing.

Colloquial Usage

Use when you want to reassure someone that their statement or belief is correct.

Indicates you've thought carefully before making a statement or judgement.

Often used to preface a personal opinion or interpretation.

Use it when you partly agree but also have reservations or additional points.

Shows you're not fully convinced or certain about something.

Suggests hesitation or the need for further verification.

Use it to soften a statement when you're unsure and don't want to seem too assertive.