The difference is that the past is something that happened previously for example Maria singing, present is what is happening at this moment for example Juan is eating and the future is something that will happen after, for example, Lucy will play.
They are verb tenses
C.His ideas for a kind and generous rebuilding of the South were not carried out.
<span>William Marbury supported the Judiciary Act of 1789 because it allowed Marbury to take his case to the Supreme Court.
Hope it helps :D
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Many people who immigrated to the United States during the Gilded Age moved to urban city areas, since this was where a majority of the new jobs could be found.