Thanks, but I really don't understand the meaning by using "when", can you tell me what's going on about the sentence? Like which part of the sentence comes first, then what happened.
The princess was playing with her ball when / while she slipped and fell into the pond
Chances are, You won't be able understand the answers from the forum if your grammar fundamemtal remains on the same level. The while and when contexts, as a rule, suggest two or more events are involved. You can only use "while" with something in prorgress. You can not say " The