Apostrophes
The house on the left is the Smiths, but the house at the end of the street is the Whites
The house on the left is the Smiths’, but the house at the end of the street is the Whites’.
Punctuate: "Some important dates in US history are July 4 1776 December 7 1941 and September 11 2001"
"Some important dates in US history are July, 4, 1776; December 7, 1941; and September 11, 2001."