It looked like rain might set in, in which case more of her boarders would stay in to dinner.
(It; looked; like rain might set in, in which case more of her boarders would stay in to dinner) (rain; might set in; ) (more of her boarders; would stay; in; to dinner)
It rain more of her boarders
looked might set in would stay
like rain might set in, in which case more of her boarders would stay in to dinner
in to dinner