Skills learn from books对吗?还是learning?learned?我的意思是做skill的后置定语应该选哪个

问题描述:

Skills learn from books对吗?还是learning?learned?
我的意思是做skill的后置定语应该选哪个

learned

应该用learn,这是个普遍真理,应用一般式.

应该用被动语态,Skills are learned from books.