後悔の表現 - should have, could have, would have
人生やり直しができればなぁ、と思う事多いですよねぇ。
SHOULD, COULD, WOULD, ＋HAVE ＋過去分詞
表現は、そんな気持ちを表現する時に大活躍します。
下記は、実際勉強しておらず、それに対する感情が表現されています。
I should have studied last night.
You should have called me last night.
I could have studied last night.
You could have called me.
I would have studied last night.
You would have called me.
【SHOULD HAVE + 過去分詞】 は自分が主語の時は、「しておくべきだった。」と強い後悔を表します。相手や第三者が主語の時は、「するべきだった。」と責めた感じになります。
I should have studied last night.
I did not study. I made a mistake.
You should have called me last night.
You did not call me. You made a mistake.
【COULD HAVE + 過去分詞】は【SHOULD HAVE】程強くなく、「できたのにしなかった、もったい」という感じです。
I could have studied last night.
I had a chance to study. I missed an opportunity.
You could have called me.
You had a chance to call me. You missed an opportunity.
【WOULD HAVE + 過去分詞】 は「何かのせいでしたかったのにできなかった」という意味を表します（仮定法参照）。
I would have studied last night.
I did not study because of a particular condition.
You would have called me.
You did not call me because of a particular condition.
Be Supposed to
予定・期待や義務を表現する際に使う【BE SUPPOSED TO】。使用頻度高いですよ。
The game is supposed to begin at 10:00.
I am supposed to meet him today.
= I am required to meet him today.
【BE SUPPOSED TO】は、単純に、義務や予測を表すだけでなく、こうしなきゃいけないけどできそうもないなぁ、というニュアンスを表す事ができます。
例えば遅刻魔で朝寝坊の私が、
"I'm supposed to meet him at 10 o'clock tomorrow."
と言うと、予定があると単純に言っているより、遅刻しそう、と言っているように聞こえます。
【BE SUPPOSED TO】は過去形になると叶わなかった期待や行われなかった義務を表します。
I was supposed to call him last night (but did not).
I had to call him last time. ("and I did" OR "but I did not")
had toの場合、行為が行われたかどうかは問題ではありません。
