Sentence 1: Pam has been planning on taking a trip on her bicycle. 
 Sentence 3: She has invited her friends to join her 
 Sentence 4:  Pam and her friends are now cycling together on the trip 
 Sentence 5:  Pam and her friends agree to do this every month from now on 
 Option 1: It will be a bicycle trip through the countryside. 
 Option 2: She had to cancel her plans because of bad weather.