〜以来
Ever since 〜以来
Meaning
"Ever since ~" — a state that has held continuously from a past point until now.
Formation
[verb て-form] + 以来 · [noun] + 以来
Notes
Only for a long stretch reaching the present, so it does not suit a short or finished period: ×昨日以来. The clause after it describes an ongoing state, often with ている. 〜てから is the neutral everyday alternative.
Examples
卒業（そつぎょう）して以来（いらい）、一度（いちど）も会（あ）っていません。
I have not seen him once since we graduated.
Breakdown
去年（きょねん）以来（いらい）、この町（まち）は大（おお）きく変（か）わりました。
This town has changed greatly since last year.
Breakdown
日本（にほん）に来（き）て以来（いらい）、毎日（まいにち）日本語（にほんご）を使（つか）っています。
Ever since I came to Japan I have used Japanese every day.
Breakdown
入社（にゅうしゃ）以来（いらい）、ずっと同（おな）じ仕事（しごと）をしています。
I have done the same job ever since I joined the company.
Breakdown
事故（じこ）を起（お）こして以来（いらい）、運転（うんてん）が怖（こわ）くなりました。
Ever since I had the accident, driving has frightened me.
Breakdown
⚠️ Often confused with
〜た後で / 〜後
After doing 〜後で
"After doing ~". Attach to the ta-form of a verb, or a noun + の. Note the contrast with...
〜てから
After doing (and then) 〜てから
"After doing ~ (and only then ~)". Emphasizes that action B happens AFTER action A is comp...
〜前に
Before doing 〜前に
"Before doing ~". Attach to the dictionary form of a verb or a noun + の. The action AFTER...
〜たとたん（に）
The moment 〜たとたん
"The moment ~", "just as ~" — the second event follows instantly and unexpectedly.
〜次第
As soon as 〜次第
"As soon as ~", "the moment ~ is done". Formal, and always about the future.
〜たびに
Every time 〜たびに
"Every time ~", "whenever ~" — the second thing happens on each occasion of the first.
〜ぶり
After an interval 〜ぶり
"After an interval of ~" — how long it has been since this last happened.
〜かと思うと
No sooner than 〜かと思うと
"No sooner had ~ than ~", "just when you think ~" — two events tread on each other.
〜上で
After (formal) 〜上で
"After ~ing (and on that basis)" — a deliberate step taken before deciding.
〜ところに / 〜ところへ
Just as / right when 〜ところに
"Just as ~", "right when ~" — something arrives at exactly that moment.
〜に際して
At the time of 〜に際して
Formal "on the occasion of ~", "at the time of ~" — used as something significant begins.
〜てはじめて
Only after 〜てはじめて
"Only after ~", "not until ~ did I …".
〜てからというもの
Ever since then 〜てからというもの
"Ever since ~" — a turning point after which things have stayed changed.
〜に先立って
Prior to 〜に先立って
"Prior to ~", "in advance of ~" — a preliminary step before a major event.
〜際（に）
On the occasion of 〜際（に）
A formal "when ~", "on the occasion of ~".
〜が早いか
The instant that 〜が早いか
"The instant ~ happened, ...", "no sooner ~ than ...".
〜や否や
Scarcely when 〜や否や
"As soon as ~", "scarcely had ~ when ..." — the two events are almost simultaneous.
〜そばから
No sooner done than undone 〜そばから
"No sooner is ~ done than (it is undone)" — the effort is immediately cancelled out.
〜なり
Immediately upon 〜なり
"The moment ~", "immediately upon ~ing" — one action leads straight into an unexpected nex...
〜を境に
Marking the turning point 〜を境に
"With ~ as the dividing line", "ever since ~" — a clear before and after.
〜がてら
While also doing 〜がてら
"While ~ing", "taking the opportunity of ~ing to also ..." — two purposes in one outing.
〜間際に
On the verge of 〜間際に
"Just as ~ is about to happen", "at the very last moment before ~".