上級英語文法
基礎を超えて学びましょう。このリファレンスは、英語の熟練者を特徴付ける高度な文法構造を扱います。学術的なエッセイ、公式な報告書、洗練されたスピーチを際立たせるパターンです。
48 structures · 6 topics
"If I were you"
hypothetical advice using past subjunctive
"If I were you, I would reconsider the offer."
"I suggest that he be"
mandative subjunctive after verbs of recommendation
"The committee suggests that he be removed from the position."
"It is essential that she attend"
present subjunctive after adjectives of necessity
"It is essential that she attend the hearing in person."
"Were it not for"
inverted conditional replacing "if it were not for"
"Were it not for your help, we would have failed."
"Had I known"
inverted past perfect conditional (third conditional)
"Had I known about the delay, I would have left earlier."
"I wish I had studied"
expressing regret about the past with wish + past perfect
"I wish I had studied medicine instead of law."
"as though it were"
subjunctive in comparisons with as if / as though
"He speaks as though it were the most obvious thing in the world."
"lest he forget"
subjunctive after "lest" to express a feared outcome
"Write it down lest he forget the instructions."
"Not only did he lie"
inversion after negative adverbial "not only"
"Not only did he lie, but he also refused to apologise."
"Never have I seen"
inversion after negative adverb "never" for strong emphasis
"Never have I seen such dedication in a student."
"Rarely does she complain"
inversion after "rarely" to stress an unusual fact
"Rarely does she complain, even when exhausted."
"No sooner had he arrived"
inversion in correlative structure "no sooner…than"
"No sooner had he arrived than the meeting began."
"Little did they know"
inversion after "little" meaning "not at all"
"Little did they know that the project was already doomed."
"Only after the trial"
inversion when a sentence starts with "only + time expression"
"Only after the trial did the truth finally emerge."
"So serious was the situation"
inversion after fronted adjective phrase with "so"
"So serious was the situation that Parliament was recalled."
"Under no circumstances should"
inversion after negative prepositional phrase
"Under no circumstances should you sign a blank contract."
"It was the data that convinced"
"it-cleft" foregrounding the subject for emphasis
"It was the data that convinced the investors, not the pitch."
"What I need is more time"
"wh-cleft" (pseudo-cleft) to highlight a need or desire
"What I need is more time to revise the proposal."
"All that remains is to sign"
minimising cleft with "all" to indicate a single remaining action
"All that remains is to sign the agreement and file it."
"It is because she practises"
"it-cleft" foregrounding a reason with "because"
"It is because she practises every day that her accent has improved."
"What surprised me most was"
pseudo-cleft highlighting an unexpected finding
"What surprised me most was the speed of their response."
"It was not until midnight"
"it-cleft" with negative time clause to stress a delayed event
"It was not until midnight that the results were announced."
"The one thing he regrets is"
nominal cleft focusing on a single regret or achievement
"The one thing he regrets is not travelling more in his twenties."
"What the research shows is"
wh-cleft to introduce academic evidence formally
"What the research shows is that early intervention is critical."
"must have been"
logical deduction about a past event (epistemic must)
"She must have been exhausted after the twelve-hour flight."
"should have told"
criticism or regret about a past action not taken
"You should have told me earlier — I could have helped."
"could have avoided"
unrealised past possibility, often implying missed opportunity
"We could have avoided the dispute with better communication."
"might well be"
"might well" for a strong, considered possibility
"This might well be the most important decision of your career."
"need not have bothered"
an action that was done but was unnecessary
"You need not have bothered cooking — we ordered takeaway."
"ought to have submitted"
moral obligation in the past that was not fulfilled
"The department ought to have submitted the report by Friday."
"will have finished"
future perfect expressing certainty about completion
"By the time you arrive, I will have finished the report."
"would rather you didn't"
expressing a preference about someone else's action
"I would rather you didn't mention it in the meeting."
"which, as we have seen,"
non-restrictive relative clause with parenthetical aside
"The policy, which, as we have seen, has failed before, is being revived."
"whose findings suggest"
possessive relative clause referring to a person or body
"The team, whose findings suggest a link, will present next week."
"in which case"
relative clause modifying a whole proposition
"The deadline may be extended, in which case we can revise the scope."
"that which cannot be measured"
formal nominal relative clause meaning "the thing that"
"That which cannot be measured is often the most important."
"whoever wins the vote"
free relative clause acting as a noun phrase subject
"Whoever wins the vote will face enormous challenges."
"whether or not he agrees"
nominal "whether" clause as subject of a verb
"Whether or not he agrees is irrelevant to the final decision."
"the fact that it was delayed"
extraposed "that" nominal clause introduced by "the fact that"
"The fact that it was delayed raises serious questions."
"wherever the evidence leads"
free relative of place expressing open-ended commitment
"We must follow wherever the evidence leads, however uncomfortable."
"This problem, we cannot ignore"
topicalisation of object to sentence-initial position
"This problem, we cannot ignore any longer."
"Strange as it may seem"
fronted concessive adjective clause
"Strange as it may seem, the simpler solution was overlooked."
"Of particular concern is"
prepositional phrase fronted to foreground an issue
"Of particular concern is the lack of transparency in the process."
"Central to the argument is"
fronted adjective phrase for academic emphasis
"Central to the argument is the assumption that growth is linear."
"Deeply troubling are the reports"
subject-verb inversion after fronted adjective for rhetorical weight
"Deeply troubling are the reports emerging from the field."
"do emphasise"
auxiliary "do" added for emphatic affirmation
"We do emphasise the importance of independent verification."
"Above all, it must be noted"
fronted adverbial "above all" to signal the key point
"Above all, it must be noted that correlation does not imply causation."
"Precisely because of this"
fronted causal phrase for logical-emphatic cohesion
"Precisely because of this ambiguity, the law requires clarification."
よくある質問
限定用法の関係詞節と非限定用法の関係詞節の違いは何ですか？
限定用法（制限用法）の関係詞節は、どの人や物を指すかを特定します。例：「合格した学生が証明書を受け取る」。非限定用法はすでに特定されたものに補足情報を加えます。例：「私の兄は、ベルリンに住んでいるのですが、来週来ます」。非限定用法は常にコンマで区切られ、"that"は使えません。
英語の文章で倒置はいつ使うべきですか？
否定または制限的な副詞句（Never、Rarely、Not only、No sooner など）の後の倒置は、学術的・ジャーナリスティックな正式文体の標準です。強調とスタイルの多様性を加えます。日常会話では不自然に聞こえるため、乱用は避けましょう。
命令的仮定法とは何ですか？今も使われていますか？
命令的仮定法は、推薦や要求を表す動詞・形容詞の後に動詞の原形を使います。例：「It is vital that the data be verified.」アメリカ英語では健在で、正式なイギリス英語でも増えています。"should + 不定詞"の代替より権威ある印象を与えます。
分裂文はどのように文章を改善しますか？
分裂文（"It was X that…"、"What I found was…"）は、語順を不自然に変えずに正確に強調したい場所に焦点を当てることができます。特定の原因・発見・対比を強調したい学術的な文章に最適です。
"must have been"と"should have been"の違いは何ですか？
"must have been"は過去の出来事に対する論理的推論を表します。例："She must have been tired." "should have been"は果たされなかった義務や期待を表します。例："The report should have been submitted yesterday." 両者は根本的に異なる意味を持ちます。
これらの構造を身につける最速の方法は、本物のコンテキストで聴くことです。
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