theory
A formal set of ideas or principles intended to explain a specific phenomenon or a group of facts. In scientific contexts, it represents a well-substantiated explanation supported by evidence, while in general usage, it often refers to a plausible but unproven conjecture.
例文
3 / 5I have a theory that my neighbor only mows his lawn when he sees me relaxing in the garden.
I have a personal explanation that my neighbor mows his lawn specifically when I am relaxing.
The researchers proposed a new theory to account for the sudden shift in climate patterns.
The researchers suggested a formal explanation for the abrupt change in climate.
My theory is he didn't show up because he's still mad about yesterday.
My guess is that his absence is due to him being angry about yesterday.
語族
覚え方のコツ
Think of a 'Theater' (from the same Greek root 'thea', meaning a view). A 'theory' is a specific 'way of viewing' or 'looking at' how things work.
クイックテスト
Everything sounds great in _______, but we need to see how the customers react to the actual product.
正解！
正解は： theory
例文
I have a theory that my neighbor only mows his lawn when he sees me relaxing in the garden.
everydayI have a personal explanation that my neighbor mows his lawn specifically when I am relaxing.
The researchers proposed a new theory to account for the sudden shift in climate patterns.
formalThe researchers suggested a formal explanation for the abrupt change in climate.
My theory is he didn't show up because he's still mad about yesterday.
informalMy guess is that his absence is due to him being angry about yesterday.
Einstein's general theory of relativity revolutionized our understanding of space and time.
academicEinstein's scientific framework for relativity changed how we perceive space and time.
In theory, the new software should reduce processing time by half, though we need to run more tests.
businessAccording to the planned design, the software should be faster, but it is not yet proven.
語族
よく使う組み合わせ
よく使うフレーズ
in theory
Used to describe what is supposed to happen, often implying it might not happen in reality.
pet theory
A favorite idea or explanation that someone likes to promote.
put into practice
The act of applying a theory to real-life situations.
よく混同される語
A hypothesis is a tentative starting point for investigation, while a theory is a comprehensive, often well-tested explanation.
使い方のコツ
Use 'theory' carefully in scientific writing; it implies a high level of evidence and systematic reasoning. In casual conversation, 'theory' is often synonymous with 'hunch' or 'guess'.
よくある間違い
Learners often say 'in the theory' when they mean 'in theory'. Also, avoid using 'theory' to describe a simple observation; it usually requires a set of underlying principles.
覚え方のコツ
Think of a 'Theater' (from the same Greek root 'thea', meaning a view). A 'theory' is a specific 'way of viewing' or 'looking at' how things work.
語源
From Late Latin 'theoria', originating from the Greek 'theōria', meaning 'contemplation, speculation, or a looking at'.
文法パターン
文化的な背景
In modern English-speaking scientific culture, the phrase 'it's just a theory' is controversial because it confuses the colloquial meaning (guess) with the scientific meaning (rigorous framework).
クイックテスト
Everything sounds great in _______, but we need to see how the customers react to the actual product.
正解！
正解は： theory
関連語彙
関連単語
to
A1Used to indicate the place, person, or thing that someone or something moves toward. It can also mark the recipient of an action or the limit of a range.
and
A1A primary conjunction used to connect words, phrases, or clauses that are grammatically equal. It indicates addition, a sequence of events, or a relationship between two things.
a
A1A word used before a singular noun that is not specific or is being mentioned for the first time. It is used only before words that begin with a consonant sound to indicate one of something.
that
A1This word is a demonstrative pronoun used to indicate a specific person, object, or idea that is further away in space or time from the speaker. It is also used to refer back to something that has already been mentioned or to introduce a clause that identifies something.
I
A1The pronoun 'I' is used by a speaker or writer to refer to themselves as the subject of a verb. It is the first-person singular subject pronoun in English and is always capitalized regardless of its position in a sentence.
for
A1Used to show who is intended to have or use something, or to explain the purpose or reason for an action. It is also frequently used to indicate a specific duration of time.
not
A1A function word used to express negation or denial. It is primarily used to make a sentence or phrase negative, often following an auxiliary verb or the verb 'to be'.
with
A1A preposition used to indicate that people or things are together, in the same place, or performing an action together. It can also describe the instrument used to perform an action or a characteristic that someone or something has.
he
A1A pronoun used to refer to a male person or animal that has already been mentioned or is easily identified. It functions as the subject of a sentence.
you
A1Used to refer to the person or people that the speaker is addressing. It is the second-person pronoun used for both singular and plural subjects and objects.
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