he'll go out there and spend four hours on the lawn
He'll go and work on the lawn for four hours.
He doesn't really care about the lawn, and doesn't spend much time on it.
there is one state that does that in public
A man is assisting a woman as she's lifting a heavy weight.
Two boys play checkers at a living room table.
Realizing that he could not resist, their grip loosened.
If your visitors come, I will talk to them.
Women are walking on a sidewalk.