Definitely with 一定

Structure 一定 + (要/会) + Verb

一定 (yīdìng) means "for sure, without fail". With 要 it expresses firm intention or insistence: 你一定要来 = "you must come, no excuses". With 会 it expresses certainty about the future: 他一定会成功 = "he’s sure to succeed". It goes before the modal or verb.

Examples

你nǐ一yī定dìng要yào来lái。
You really must come.
明míng天tiān我wǒ一yī定dìng到dào。
I’ll definitely be there tomorrow.
他tā一yī定dìng会huì成chéng功gōng。
He’s sure to succeed.

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