If you are not prepared, then you will not be able to participate in our class discussion.

要是你没准备的话，你就不能参加课堂讨论。

youdao

Even if you are not prepared to work up a sweat three times a week, any activity is better than none.

即使你不准备1周流3次汗，任何活动总比没有要好。

《柯林斯英汉双解大词典》

OK, now you know what your friend wants, and it is something which you are not prepared to give.

好，现在你知道你朋友想要什么，而且是你没准备好付出的。

youdao

If you are not prepared, then you will not be able to participate in our class discussion.

要是你没准备的话，你就不能参加课堂讨论。

Make sure 实战 - SpeakingMax英语口语达人

Sir Christopher told Ms Watson: "We are up against a brick wall because we are disappointed you are not prepared to think more widely than you are prepared to do".

BBC: Money

If not properly prepared, you are guaranteed not to succeed, not to reach the summit.

FORBES: CENTURY 21's CEO Embarks On His Toughest Journey Yet

The success of his unusual book depends on whether or not you are prepared to indulge his flights of fancy, his whimsical asides, his outspoken views.

ECONOMIST: Renaissance advice books