本文へ移動
Flalingo

英語の練習

英語で過去の成功を言うには:“could”“was able to”“managed to”の違い(C1+)

A woman points to a tactile control board while a man compares a broken light prototype with a delivery calendar.

C1+(上級プラス)の英語で過去の能力を表すガイド:“could”が使える場面、一度きりの成功に“was able to”や“managed to”が必要な理由、使える否定形、そして“can”にない形を補う“be able to”を学びます。

過去の一般的な能力には“could”を使います。“At university, she could repair almost any analogue device.” 特定の試みが一度うまくいったときは“was able to”か“managed to”を使います。“Despite the blackout, the team was able to finish the test.” “couldn’t”や“wasn’t able to”などの否定形は、どちらの場合にも使えます。この記事はC1+(上級プラス)レベルで、英語を流暢に話せるけれど、過去の結果を正確に伝えたい大人向けです。

この記事が向いている人

  • 英語を流暢に話せるのに、実際にできたことを言うときにまだ“we could finish the test”と言ってしまう上級の大人。
  • 英語で進捗を報告する人:達成したことと、まだ条件次第のことを分けて伝える必要があるプロジェクトリーダー、エンジニア、コンサルタント。
  • 面接やプレゼン、会話で、挫折と立ち直りの経験を話す準備をしている人。
  • まだ早い場合:話の中で過去形と過去進行形がまだ混ざるなら、先にB1で背景と転機のある旅行の話を練習しましょう。
  • 簡単すぎる場合:これらの形を考えずに選べるなら、C1+のライティングに進み、演劇レビューで演出の選択を説明しましょう。

サンプルページを開く

サンプルページを開く

単語カード

Personal · a setback

Think of a setback that you or someone you know recovered from. Who or what helped in a way an outsider might not notice?

Useful: ‘Looking back, I couldn’t have… without…’ · ‘What people didn’t see was…’ · ‘It may sound odd, but…’

Big idea · effort and luck

How much of what people achieve is down to effort, and how much to circumstances beyond their control? Can we ever separate the two?

Useful: ‘It’s not a question of either… or…’ · ‘I’d put it down largely to…’ · ‘You could argue that…, but…’

会話

maya I can read the diagnostic output, but I’m unable to reach the reset switch while wearing the mobility brace.

owen I could always operate the older panel easily. With this one, I couldn’t even locate the emergency control.

maya The fabricator has been able to move the switches, and we should be able to test the revision tonight.

owen Good. During the power cut, Rosa was able to guide us through the shutdown by touch. That single success changed the design brief.

maya If the labels arrive, volunteers might be able to run the next trial without us.

文の形

Present and general ability

  • Can is the usual neutral form: “Owen can calibrate the sensor without supervision.”
  • Be able to has a slightly more formal tone: “Maya is able to interpret the tactile data.”
  • Be unable to is formal and explicit: “The supplier is unable to guarantee Friday delivery.”

Forms that can does not possess

  • Infinitive: “We hope to be able to reopen the workshop.”
  • Perfect: “They have been able to reduce the unit’s weight.”
  • Future: “The night team will be able to test it tomorrow.”
  • After another auxiliary: “We might be able to borrow a thermal camera.”

Past ability

  • Could describes general past ability: “At university, Maya could repair almost any analogue device.”
  • A positive achievement on one specific occasion normally uses was or were able to, meaning managed to: “Despite the blackout, the team was able to finish the test.”
  • For a failed specific attempt, couldn’t, wasn’t or weren’t able to, and was or were unable to are all possible: “They couldn’t unlock the cabinet”; “They were unable to unlock it.”

追加の練習

Promise only what the team can deliver

Maya points to a tactile control board while Owen compares a broken light prototype with a delivery calendar.

What the comeback story leaves out

A woman points to a coastal trail map while three hikers listen, with a weather chart, a radio and a water bottle on the table.

What the comeback story leaves out

Every summer for eleven years, Ines Okafor ran sea-kayaking trips from a small harbour on the west coast. She could read the water better than almost anyone in the village, and returning clients would ask for her by name. Then, in the space of a single spring, the business fell apart. A landslide closed the only road to the harbour, her insurer disputed a claim for two damaged boats, and a wrist injury meant that she was unable to paddle for most of the season.

What happened next is the kind of story magazines love. With the road shut, Ines was able to persuade a fishing cooperative to carry her kayaks round the headland by boat. She switched from guiding to teaching, trained two young instructors, and by the following summer was running more trips than ever. When a regional newspaper wrote about her, the headline called her “unbreakable”. She has the cutting pinned above her desk, she says, “mainly as a warning”.

The warning is about the word itself. Comeback stories tend to present recovery as a quality of character: some people can bend without breaking, and others simply cannot. It is an appealing idea, and it may well contain some truth. Persistence matters; so does a willingness to look foolish while learning something new. But when Ines tells the story herself, character is only one element, and rarely the first. The cooperative happened to have a spare boat that month. Her sister could lend her money without asking for it back quickly. A former client who worked in insurance explained, patiently and for free, how to challenge the rejected claim.

None of this appears in the “unbreakable” version, and Ines thinks it is the whole point. “I may have worked hard, but I wasn’t the only one working,” she says. A neighbour whose café flooded in the same storm, she points out, was every bit as determined. He couldn’t find a lender, his landlord refused to wait, and the café closed within months. “He could have been the most determined man on the coast; it wouldn’t have saved the café. Nobody wrote a headline about him.”

There is, of course, another way to read all this. Critics of what they call “luck talk” argue that stressing circumstances can be just as misleading as stressing character. If success is mostly a matter of who happens to own a spare boat, why should anyone bother to persist? People who have come through real hardship can find it insulting to be told that they were merely fortunate. And it can’t have been luck alone that made Ines teach herself a new trade at forty-three while her wrist was still in a brace. The effort was real, even if the support was invisible.

The honest answer is probably that the two explanations need each other. Determination decides what a person does with an opportunity; circumstances decide whether the opportunity exists at all. The trouble with the heroic version is not that it praises effort, but that it quietly implies that everyone who failed to recover might have tried harder. That is a comfortable conclusion for anyone who has never been tested, and a cruel one for those who have.

Ines now runs a short course for small tourism businesses on planning for a bad season. Her first exercise is to list everyone who would help if the road closed tomorrow, and to be honest about which names are missing. “If the list is short, you might as well start building it now,” she tells them. “Nobody will be able to do it for you in the middle of a landslide.” When people ask whether she is proud of her comeback, she says yes, and then adds that she would like the word to come with a list of credits, like a film.

この単元を学ぶ
どの方法で学びますか?
アカウントをお持ちですか?

無料アカウントで1つの単元をずっと開いておけます。

“could”と“was able to”:能力か、一度の結果か

“could”はある期間を通じた能力を表し、特定の日に何が起きたかは伝えません。ある行動が一度うまくいったと伝えるには“was able to”か“were able to”を使います。日本語の「〜できた」は一般的な能力にも一度きりの成功にも使うため、成功した出来事まで“could”と訳しがちです。能力なのか結果なのかを先に確かめましょう。

  • 一般的な能力:“By the age of twelve, he could rebuild a bicycle wheel.”
  • 一度きりの成功:“Despite the darkness, Lina was able to find the correct valve.”
  • “managed to”は努力や難しさを加えます。「なんとか〜できた」に近い表現です。“After three attempts, we managed to restart the server.”

否定形と、“could”が使える場面

失敗した試みには、どの否定形も使えます。肯定の“could”も2つの場面では使えます。

  • 失敗した試み:“We couldn’t open the cabinet.” “We were unable to open the cabinet.”(改まった言い方)
  • “see”“hear”などの知覚動詞は、一度の場面でも“could”を使います。“From the control room, we could see smoke above the east wing.”
  • 文をほぼ否定にする“hardly”:“With the brace on, I could hardly reach the switch.”

“be able to”:“can”にない形

“can”には不定詞、-ing形、完了形がなく、ほかの助動詞の後にも置けません。日本語の「できる」は「できるようになる」「できたかもしれない」のように自由に形を変えられますが、英語の“can”は形を変えられないので、“be able to”が代わりを務めます。

  • 不定詞:“We hope to be able to reopen the workshop.”
  • 完了形:“They have been able to reduce the unit’s weight.”
  • 未来、まだ身についていない能力:“Once the labels arrive, volunteers will be able to run the trial.” すでに決まった予定なら“can”で十分です。“We can test it tomorrow evening.”
  • ほかの助動詞の後:“We might be able to borrow a thermal camera.”
  • 改まった言い方:“The supplier is unable to guarantee Friday delivery.”

一つの職場の問題で形を聞き分ける

2人のエンジニアが、体の動きに制限のある人のために設計し直した操作パネルを試しています。過去の唯一の成功である停電中のシャットダウンには“was able to”、まだ試していない改良版には“should be able to”が使われています。

Maya I can read the diagnostic output, but I’m unable to reach the reset switch while wearing the mobility brace.

Owen I could always operate the older panel easily. With this one, I couldn’t even locate the emergency control.

Maya The fabricator has been able to move the switches, and we should be able to test the revision tonight.

Owen Good. During the power cut, Rosa was able to guide us through the shutdown by touch. That single success changed the design brief.

Maya If the labels arrive, volunteers might be able to run the next trial without us.

言い過ぎない進捗ブリーフィング

タイムラインの段階ごとに合う形を使い、どの見込みにも条件を添えましょう。

  • 現在:“We can run the diagnostics remotely, but we are unable to replace hardware.”
  • 一度の成功:“Last Tuesday, we were able to restore power within an hour.”
  • 失敗した試み:“We couldn’t reach the supplier, and the courier wasn’t able to deliver.”
  • 次の段階:“If the parts arrive on Thursday, we should be able to open on time; if not, we might be able to open one room.”
自分に合った方法でこの単元を学ぶ

挫折の経験を話す

“could have”+過去分詞は、可能だったのに起きなかったことを表します。「終えることもできたのに」に近い意味です。“We could have finished on Friday, but we waited for the client’s approval.” “couldn’t have … without”は、結果を支えた助けを認める表現です。“Looking back, I couldn’t have done it without my sister’s help.” 声に出して話してみましょう。

  • “Who helped you through a setback in ways outsiders might not notice?” 使ってみましょう:“Looking back, I couldn’t have… without…”
  • “Is success down to effort or to luck?” 使ってみましょう:“I’d put it down largely to…”

よくある間違い

次の点を確認しましょう。

  • “After three attempts, we could restart the server.” “managed to”か“were able to”を使います。
  • “will can”や“have could”:“will be able to”“have been able to”を使います。
  • 達成した結果に“could have”を使うこと:逆の意味になります。
  • “succeeded to reduce”:“succeeded in reducing”と言います。
  • 条件を隠した約束:“We will be able to open on Friday.”ではなく“We should be able to open on Friday, provided the parts arrive.”と言いましょう。

1日10分の練習法

すべての文を声に出して言いましょう。

  • 3分:子どもの頃にできたこと3つと、苦労してやり遂げたこと1つ。
  • 3分:昨日の仕事を“can”“was able to”“couldn’t”“have been able to”で報告する。
  • 2分:言い切った約束を、“should be able to”と条件を使って書き直す。
  • 2分:上の会話を1行ずつまねて言う。

次のステップ

次のC1+では、条件を確かめながら助言に疑問を投げかけ、演劇レビューで演出の選択を説明し、昇進機会の不平等を分析しましょう。C1では、変化した記憶についての振り返りの記事を書きましょう。

よくある質問

“could”と“was able to”の違いは何ですか?

“could”はある期間を通じた一般的な能力を表します。“was able to”は、あることが一度うまくいったことを伝えます。

過去の一度きりの成功に“could”を使えますか?

行動を表す肯定文では使いません。“see”“hear”“hardly”と一緒に使う場合や、否定文なら問題ありません。

“managed to”と“was able to”は同じ意味ですか?

どちらも一度の成功を表しますが、“managed to”はそれが難しかったことを強調します。

この単元を学ぶ
どの方法で学びますか?
アカウントをお持ちですか?

無料アカウントで1つの単元をずっと開いておけます。

次は何をしましょうか?

Flaiで練習を続けよう

Flaiは、音声会話、訂正内容、レッスンレポートでスピーキング練習を支えるFlalingoのAIアプリです。

ライブの先生と学ぶ

Flalingoのレッスンでは、このような単元をライブの先生とマンツーマンで練習します。