既然就

nǐ jì rán biǎo shì le jué xīn jiù yīng gāi wèi zhī nǔ lì

你既然表示了决心，就应该为之努力。

Now that you have expressed your determination, you should act.

nǐ de jià shǐ kǎo shì jì rán yǐ hé gé jiù kě yǐ dú zì kāi chē le

你的驾驶考试既然已合格，就可以独自开车了。

Since you've passed your test, you can drive on your own.