we should learn to be face with difficulties

这句话语法是对的,但您可能拼错了一个单词,face 应该是 faced；
We should learn to be faced with difficulties.(learn 后接不定式,所以语法没问题)
be faced with 面临、面对,例如：
1、They are all faced with the same problem.他们都面临同样的问题.
2、The small legacy was as welcome as flowers in spring, coming just when they were faced with an enormous bill.那一小笔遗产来得正是时候,他们正好面临一大笔要支付的帐单.
另外,可以说：to face difficulties（面临/正视困难）,但通常不说 to face with difficulties