learn...by heart这个短语有无过去式?

learn...by heart这个短语有无过去式? know/learn by heart 请问有learn by这个短语吗,是什么意思?谢谢. learn sth by heart造句 learn by heart中的heart什么意思 learn the new words by heart意思 learn sth.by heart的意思 learn by heart 的中文意思 Learn the rhyme by heart怎么翻译 翻译：you should learn it by heart until you learn it by heart是什么意思. 背诵 learn ...by heart 可不可以说 learn ...by one's heart learn...by heart,heart and soul ,with all one'heart,in some way learn sth by heart 为什么说是 “听说” ,by heart 这词是什么意思 用learn sth by heart造句,求帮, by to it's learn important english heart words in the order中文意思learn ...by heart We must ______ the importance of the four modernizations.A.learn by heart B.keep in mind C.remember by heart D.know by heart 选哪个?为什么?