I want to know about usage of "start + action" and "stop + action". Which one of followin are correct or preferred? For ex.
When shall I start working?
When shall I stop working?
When shall I start to work?
When shall I stop to work?
Does it depend on a context or on the action itself? Are there any rules that I can apply to phrases contain "start" and "stop"? Or maybe there are some differences in meaning?