HSK 3 · adjective · adverb · Practice
一定
certainly; surely; definite
明天我一定来。
Míngtiān wǒ yídìng lái.
I will definitely come tomorrow.
这个说法有一定的科学性。
Zhège shuōfǎ yǒu yídìng de kēxuéxìng.
This statement has a certain scientific quality.
这个看法太主观了，不一定对。
Zhège kànfǎ tài zhǔguānle， bù yídìng duì。
This view is too subjective and not necessarily right.
总之，我们明天一定要出发。
Zǒngzhī， wǒmen míngtiān yídìng yào chūfā。
In short, we must set off tomorrow.