Sentence 1: Sam was tired after watching a movie. 
 Sentence 3: Eventually he made it to his bed 
 Sentence 4:  He woke up when he thought it was morning 
 Sentence 5:  He had just forgotten to turn off the lights, though 
 Option 1: He almost fell asleep on the sofa. 
 Option 2: He fell asleep all night on the sofa.