used to

・"used to"は過去の習慣的行為や状態を表すのに使われる。
・一般動詞として扱われ、疑問文や否定文を作るには助動詞didを使う。

［正］He didn't use to smoke.
［正］He didn't used to smoke.
［誤］He used not to smoke.
［誤］He usen't to smoke.
［誤］He usedn't to smoke.
［正］Did he use to smoke?
［正］Did he used to smoke?
［誤］Used he to smoke?

・イギリス英語では助動詞としても扱われる。

［英］He didn't use to smoke.
［英］He didn't used to smoke.
［英］He used not to smoke.
［英］He usen't to smoke.
［英］He usedn't to smoke.
［英］Did he use to smoke?
［英］Did he used to smoke?
［英］Used he to smoke?

used toの関連項目

• ⇒ can, could, be able to
• ⇒ may, might
• ⇒ must
• ⇒ shall
• ⇒ should
• ⇒ will
• ⇒ have
• ⇒ ought to
• ⇒ have to