🧩 be동사 과거형 변화 공식 총정리

🧩 be동사 과거형 변화 공식 총정리

🔹 1. 기본 변화 공식

주어 종류	be동사 (현재형)	be동사 (과거형)
I	am	was
He / She / It	is	was
You / We / They	are	were

 

✅ 공식 요약

• 단수 주어(I, He, She, It) → was
• 복수 주어(You, We, They) → were
  ※ 단, You는 단수여도 복수처럼 were 사용!

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🔧 2. 문장 구조별 변화 공식

✅ (1) 긍정문 공식

주어 + was / were + 명사/형용사/전치사구

 

🔸 예시:

• I was tired.
• They were at home.
• She was a teacher.

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🚫 (2) 부정문 공식

주어 + was / were + not + 보어

 

※ 줄임말:

• was not → wasn’t
• were not → weren’t

🔸 예시:

• He was not here. = He wasn’t here.
• We were not ready. = We weren’t ready.

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❓ (3) 의문문 공식

Was / Were + 주어 + 보어?

 

🔸 예시:

• Was she sick?
• Were they at school?
• Was it fun?

💡 Yes/No 대답 공식

• Yes, 주어 + was/were.
• No, 주어 + was/were + not.

예:
Q: Was he late?
A: Yes, he was. / No, he wasn’t.

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🧠 3. be동사 과거형 변화 공식 요약표

문장 종류	공식	예문
긍정문	주어 + was/were + 보어	She was happy.
부정문	주어 + was/were + not + 보어	They weren’t busy.
의문문	Was/Were + 주어 + 보어?	Were you at the party?

 

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🗂 4. 참고: 시간 부사와 자주 함께 쓰이는 표현들

시간 표현	예문
yesterday	I was tired yesterday.
last night	He was at home last night.
two days ago	They were happy two days ago.
in 2010	We were students in 2010.