since

それ以来、その後

すでに述べた時から、現在またはその後のある時まで。

やさしい英語で： From a time already mentioned until now or another later time.

• He left in June and hasn’t called since.
• They married that year and have lived here ever since.
• The rules have since changed.

使い方： have/has + past participle + since (We met in May and have stayed friends ever since.)

類義語： since then, from then on

よく使う表現： ever since, long since, have since changed

～以来、～から

過去の特定の時から、現在またはその後のある時まで。

やさしい英語で： From a particular past time until now or a later time.

• I have lived here since May.
• She hadn’t eaten since breakfast.
• Have you seen him since Monday?

使い方： since + starting time (I have worked here since September.)

類義語： from

よく使う表現： since yesterday, since last year, since childhood, since birth

～なので、～だから

物事の理由を示す。聞き手がすでに知っている理由に使うことが多い。

やさしい英語で： Used to give a reason for something, often a reason the listener already knows.

• Since you’re here, stay for lunch.
• We took a taxi since it was raining.
• Since the shop is closed, shall we come back tomorrow?

使い方： since + clause, main clause (Since you have a car, could you drive us?)

類義語： because, as, given that

よく使う表現： since you asked, since it’s late, since you’re here

～して以来、～してから

ある出来事が起きた時から、現在またはその後のある時まで。

やさしい英語で： From the time when something happened until now or a later time.

• I have known her since we were children.
• He hasn’t called since he moved away.
• Have things improved since you started the treatment?

使い方： present perfect + since + past simple clause (I have felt better since I changed jobs.); past perfect + since + past simple clause (She had not visited since her brother moved away.)

類義語： from the time that

よく使う表現： since we met, since someone left, since i arrived

～なので、～だから

あることが起きる理由や、何かをする理由を説明する。

やさしい英語で： Used to explain the reason for something.

• Since you’re tired, take a break.
• I stayed home since I had a cold.
• Since no one objected, they continued with the plan.

使い方： since + clause, main clause (Since we have time, let’s walk home.)

類義語： because, as, given that

よく使う表現： since you asked, since it’s raining, since you’re tired