before ・・・(・・・の前に)
before seven o'clock
(7時前に)
the day before yesterday
(一昨日)
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after ・・・(・・・の後に)
after dinner
(夕食後に)
after school
(放課後)
the day after tomorrow
(あさって)
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for ・・・(・・・の間)
for a month
(1ヶ月間)
for a week
(1週間)
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since ・・・(・・・以来)
since 1990
(1990年から)
since 7 o'clock
(7時からずっと)
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till ・・・
(・・・までずっと)[継続する]
till seven
(7時までずっと)
till tonight
(今晩までずっと)
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by ・・・
(・・・までに)[完了する]
by 9 o'clock
(9時までに)
by five
(5時までに)
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