Sentence 1: In the morning, I would let the dog out and go back to bed. 
 Sentence 3: After a few minutes, he would come back in and hop on the bed 
 Sentence 4:  He would sit on the bed until I finally got up 
 Sentence 5:  This continued until the day he came back in with a dead chipmunk 
 Option 1: I often forgot to leave the door unlatched so that he could get back in. 
 Option 2: I would leave the door unlatched so that he could get back in.