如何区分to do 作目的状语和doing 做伴随状语When i was little,my mother used to sit by my bed,____me stories till i fell asleep.A.having told B.telling C.told D.to tell.表伴随.可我疑惑的是为什么不能选D表目的?除了解释逗号的原因外,还有其他原因吗?该如何区别to do 作目的状语和doing 做伴随状语?

如何区分to do 作目的状语和doing 做伴随状语
When i was little,my mother used to sit by my bed,____me stories till i fell asleep.A.having told B.telling C.told D.to tell.表伴随.可我疑惑的是为什么不能选D表目的?除了解释逗号的原因外,还有其他原因吗?该如何区别to do 作目的状语和doing 做伴随状语?