English Grammar : article, syntax, verbs conjugation, English spelling

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  • at -- used with specific points in time “The store will open at eight o'clock.” “She left for the office at 3:15.”
  • in -- used with periods of time “The war ended in 1918.” “Cathy should be back in fifteen minutes.” “Those flowers bloom in the late spring.”
  • on -- used with days and dates “Our daughter was born on June 6, 1975.” “The game will be played on Monday.” “We stayed up late on New Year's Eve.”
  • during -- happening in or over a period of time “I took notes during the meeting.” “During the morning, it rained.” “He feel asleep twice during the play.”
  • by -- at or before a point in time “You should be here by 6:00.” “This report has to be done by Friday.” “By 8:30, he was very drunk.”
  • until -- up to a certain time “You have until 5:00 to do that work.” “I can wait until you decide.” “Until he arrives, we can't begin.”
  • from...to -- between two points of time “We waited for him from 2:30 to 3:30!” “It is very cold from October to March.” “Wendi works from Monday to Friday.”
  • before -- taking place at an earlier time “Before you talk to him, get some advice.” “He came to America before the Civil War.” “If I get home before 7:00 we can go to a movie.”
  • after -- taking place at a later time “After you talk to him, come and see me.” “I cleaned up the room after everyone left.” “Friday comes after Thursday.”
  • for -- lasting a period of time “Philip spoke to us for three hours.” “The valley was flooded for ten days.” “I plan to live in Chicago for the rest of my life.”
  • in -- after a period of time (2nd meaning) “We will begin in ten minutes.” “He is going to retire in four years.” “The election will be held in a few months.”
  • since -- starting from a point in time “We've been working since he left.” “He has been talking since 7:00.” “Since 1955, the population of this city has doubled!”

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