l don't know 与l didn't know的区别如题

l don't know 与l didn't know的区别如题 L don't know. l don t know i didn't know you had called the police before l came here为什么是didn't 而不是don't l don't know him什么意思 咋写,l don't know. 句型转换l don't know when l should leave something l don`t know something l don`t want to know翻译 Num:l don't know 【我是英语白痴】Num:l don't know and l don't know why .l can‘t think what l did wrong . what other tings don't l know about the America为什么使用don't l know而不是个l don't know? the man didn't know the way to the hotel ,and l didn't ______ l didn't know what to say中didn't为什么用过去式 l'm sad because l ___ the exam a.don't pass b didn't pass l don't know what l want to talk about,but l want to talk to you don't know the answer.l don't know------1.too2.either3.also4.neither at ( ),l didn't know him ,but now l do .括号里填什么单词 买火柴的小女孩l don,t know