Determine where commas are needed in the following sentences. 1. certainly shelli but the explanation is lengthy. a. before and after the word shelli b. between the words shelli and but. c. the sentence is correct as is. 2.we thought the movie was boring mrs. washburn a. after the word thought b. after the word boring. c. the sentence is correct as is 3. generally speaking birds are animals that have wings and fly a. after the word speaking b. after the word animals c. the sentence is correct as is 4.in fact, many birds are unable to fly but have wings a. between the words fly and but b. before and after the word to fly c, the sentence is correct as is 5.manifest destiny the belief that it was americas mission to expand westward inspired many explorers in the 1800s a. after the word explorers b. after the word destiny and after the word westward c. the sentence is correct as is.