The idea here is to make the longest run-on sentence as possible and it will make sense. Once the sentence stop making sense a new sentence is started by the next poster.
1: Only one word can be added to the sentence at a time
2: And, Or, A, and But are considered connecting words and do not count against the one word restriction ("and then", "but he", "or she" for example)
3: When the sentence starts over the starter can use up to five words to get things going.