英语：1.on10may ,LinTao was at home alone ,suddenly ,he heard someone shouting "fire,fire!"

题目

英语：1.on10may ,LinTao was at home alone ,suddenly ,he heard someone shouting "fire,fire!"
2.this morning i heard someone shouted"help ,help!"请问1,2两个句子意思一样,为什么第1个句子用shouting 而第2句用了shouted?
3the 20-year-old boy called LinTao helped his neighbour out of a fire.请问helped out of
4.just at that moment the door opened and the teacher walked in.请问walked in能换成went in
5.doctor John walk to his hospital.同意句：doctor John （）（）（）to his hospital.
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答案

第一个句子表示一种进行的状态,突然听到有人在喊,是时态的强调第二个是表示一个过程,今天早上听到有人在喊 out of a 表示离开……,这里是帮助邻居逃离火灾现场walk in和go in是不同的意思,替换了意思会改变,前...