PREPOSICIONES+DE+TIEMPO

AT ; Se usa para expresar horas, momentos del día, la edad, periodos festivos y momentos. Ejemplos; He will come at ten o´clock. I saw him at midday- He got married at 25-we will meet them again at easter.

ON ; Se usa para expresar dias y fechas. Ejemplos; I don´t go to school on Sunday. My Holiday starts on March 15 th

IN ; Se usa para expresar partes del día, estaciones, años, décadas, siglos , eras,etc. Ejemplos; I have tea in the morning- In summer they go swimming-In 1999 we had a big party-. In the 1960 s there were a lot of hippies- in te last century were many political changes- in the middle age people had little education..

FROM.......TO ; Se usa para expresar la idea "desde ....hasta". Ejemplos; They lived in teh States fron 1986 to 1997.

UNTIL ( Hasta) ; Se usa con las expresiones que determinan el final de un periodo. Ejemplos; I am tired this morning because I read a book until four o ´clock in the morning.

SINCE ( desde) Se usa con un momento concreto en el pasado. Ejemplo; John has been in hospital since last wednesday.

FOR( varios significados, por, para,,,) John has been in hospital for three days.

DURING ; Se usa junto a un sustantivo. Ejemplos; I flell asleep while I was wathing the film.

WHILE ( mientras,normalmente se usa con el pasado continuo) ; Se usa junto a una expresión verbal. I fell asleep while I was watching the film.

BEFORE( antes); Se usa pra referirse a una acción anterior, va seguido de gerundio. I always have a cup of tea before going to work

after ( despues) Se usa pra referirse a una acción posterior, va seguido de gerundio. After reading the newspaper, she left the house.