and用法 Don borke his arm when he (sled)and fell on the ice.

问题描述:

and用法 Don borke his arm when he (sled)and fell on the ice.
1.有when,有语境,为什么不用“when he was sliding”
2.这里的and,是表递进关系,而不是并列关系的,为什么要谓语一致?

这里 when he (sled)and fell on the ice 他驾雪橇时跌倒在冰上(这种表达似乎很正常,两个动作一先一后)
比较一下 :when he was sledding and fell on the ice.您看,这种表达是否很别扭?
不如把从句再变成一个主从复合句:When he was sledding ,he fell on the ice.(当然,放在原句中不适合)
另外,sled 的现在分词是sledding,而不是 sliding ,请楼主明鉴.