～以来 (〜irai)
Explanation
Indicates something happening 'since', 'ever since', or 'after' a particular time.
Formation
Verb-past + 以来, い-Adjective + 以来, Noun + 以来
Detailed Explanation
The ～以来 grammar point is used to express a period of time that has continued uninterrupted since a certain point in the past. It can be translated as 'since', 'ever since', or 'after'. The formation differs depending on whether it is used with a verb, an adjective, or a noun.
Examples
卒業以来、彼女に会っていない。
Sotsugyou irai, kanojo ni atte inai.
I haven't seen her since we graduated.
子供が生まれて以来、忙しくなった。
Kodomo ga umarete irai, isogashiku natta.
I've been busy ever since my child was born.
東京に引っ越して以来、友達が増えた。
Toukyou ni hikkoshite irai, tomodachi ga fueta.
I've made more friends since I moved to Tokyo.
あの映画を見た以来、彼女は怖がりになった。
Ano eiga wo mita irai, kanojo wa kowagari ni natta.
She's been easily frightened ever since she watched that movie.
Grammar content sourced from hanabira.org.