⑴ "学习知识"的英语怎么说
learn knowledge。
learn，英语单词，及物动词、不及物动词，作及物动词时意为“学习；得知；认识到”，作不及物动词时意为“学习；获悉”。
learn双语例句：
1、We should learn from him.
我们应该向他学习。
2、I should learn from you.
我应该向你学习。
3、We only have to learn how to see.
我们仅仅要学习如何看到那些世界。
⑵ 用英语表达“增加知识”可以用grow knowledge吗
可以用 grow 和 enrich，但比较习惯的表达是
increase knowledge of
gain additional knowledge in ...
obtain new knowledge of/about/in ...
add to my knowledge of/about/in ...
比如，
Through more reading and listening I will be able to imcrease my knowledge of commonly used English phrases.