You cannot compel good work from unwilling students.

你不使不肯学习的学生取得好成绩。

I felt constrained to do what I was unwilling to do myself.

我觉得是被我自己不愿的事情。

Not that I'm unwilling to go with you, but that I'm busy now.

并不是我不愿意和你, 而是因为现在我很忙。

He was yoked to an unwilling partner.

他不得不与一位不情愿的伙伴合作。

His tightfisted employer was unwilling to give him a raise.

他那吝啬的雇主不肯给他加薪。

The natives were unwilling to be bent by colonial power.

土著居民不愿受殖民势力的摆布。

I was an unwilling witness of their quarrel.

我不愿他们吵架的见证人。

She sank back, unwilling to face her father's anger.

她退了回, 不愿看着父亲发火。

If you are unwilling to or can't help, you should speak of it directly and don't nonsense to bullyrag him.

不愿意或力有不及则明言之，不要说些不着边际的话，吃别人豆腐。