English Skills 10th Edition by John Langan, Zoe Albright

Exercise 1

Each item that follows lacks basic punctuation. There is no period to mark the end of one sentence and no capital letter to mark the start of the next. Read each item aloud (or in your head) so that you "hear" where each sentence begins and ends. Your voice will tend to drop and pause at the point of each sentence break. Draw a light slash mark (/) at every point where you hear a break. Then go back and read the item a second time. If you are now sure of each place where a split occurs, insert a period and change the first small letter after it to a capital. Minor pauses are often marked in English by commas; these are already inserted. Part of item 1 is done for you as an example.
I take my dog for a walk on Saturdays in the big park by the lake. I do this very early in the morning before children come to the park that way I can let my dog run freely.
jumps out the minute I open the car door and soon sees the first innocent squirrel.
he is off like a shot and doesn't stop running for at least half an hour.