Now she felt her heart beating too fast 为什么句中的feel要用过去式而不用fe

She could feel her heart beating fast 翻译:She could feel her heart beating fast. she could feel her heart beating fast为什么不是beat或者to beat I can feel my heart beating faster 为什么必须用beating 而不用 beat 急 为什么她感到难过用She felt sad,而不用She feel sad? He can’t run so fast as she 这里为什么用she不用her Sitting by her side,I could feel her heart beating 刚学语法 告诉我意 She felt warmth in her heart.She felt warm in her heart. I feel my heart ___fast now. A.beaten B.beating C.to beat请问选 41.I feel my heart ______ fast now.41.I feel my heart ______ Little Mary felt cold,so she stood close to her mother.为什么不用 The time goes fast,为什么用“goes”而不用“go”?