Native Camp 文法中級の総まとめ ⑤ 助動詞
https://learning.trip-engineer.com/nativecamp-grammar-middle...助動詞
（昔は）よく～した
・used to ～（動詞）：（昔は）よく～した（現在はしていない）
・would ～（動詞）：（昔は）よく～した（現在のことは不明）
※wouldは状態（live等）を表す動詞には使えない、過去を表す副詞と一緒に使う（when・・・等）
「used to ～」
<教材：中級８>
“Mr. and Mrs. Adams used to live in a small house."
“Their son never used to go to the gym."
“She used to be able to save more money."
「would」
<教材：なし>
“I would go skiing every Sunday in winter when I was a child."
過去の後悔
・should have ～（過去分詞）：過去の後悔「～すべきだった（でもしなかった）」
・could have ～（過去分詞）：過去の後悔「～できたのに（でもしなかった）」
「should have ～」
<教材：中級４７, 中級５２＞
“I should have checked my phone sooner."
“She shouldn’t have eaten so much ice cream."
“I should have paid more attention."
「could have ～」
<教材：中級４７, 中級５２＞
“You could have talked to her in person."
“She could have acted like nothing had happened."
“We could have had fun together."
過去の推量
・must have ～（過去分詞）：過去の推量「～だったに違いない」
・might have ～（過去分詞）：過去の推量「～だったかもしれない」
「must have ～」
<教材：中級４８, 中級５２＞
“He must have forgotten it at home."
“It must have been broken."
「might have ～」
<教材：中級４８, 中級５２＞
“They might have already eaten supper."
“He might have been delayed."
～した方がよい
had better ～
<教材：中級５７, 中級５８＞
“If you ever have a chance, you had better travel around and see the world."
“Prices of most things might be more expensive there. I had better bring more money to NY."