I listened but couldn't hear anything.listen和hear为什么这么变

I listened but couldn't hear anything.listen和hear为什么这么变 I listened carefully but I couldn't hear anything（同义句转换） I listen but I can't hear anything.I listen but( )hear( ). I listen but can't hear anything=I listen but _____ hear ___ I listened but----------(hear) nothing. 不定代词的英语英语题同义句转换1 I listen carefully but didn’t hear anything I can not hear something和I can not hear anything 那个对?为什么 It was dark.I couldn't see the thief.But I could hear him sp I could hear them talking but I couldn’t figure _______ what I rang the doorbell several times but couldn't __anyone hear He ___(hear or listen(to)) carefully,but _____(hear/listen(t She could hear _______ but couldn’t see__________