기초 영어 be동사 am, are, is

*Time is money

be동사란?
I am Bill.
You are Tom.
He is Jim.
「 be동사」 be는 원형 / am, are, is 는 현재형.

ex)
I (go) to school every day.
You (play) tenis very well.
They (sing) merrily.
*원형, 현재형이 다른 동사는 be, have 동사 뿐이다.

be동사는 어떻게 변하는가? [현재형]
                단수                  복수
1인칭    I       am          We    Are
2인칭  you   Are          you  Are
3인칭    He     Is         They  Are
                She
                  It
*2인칭은 단수•복수 똑같이 You Are이다.
ex) You are a boy. 단수 / You are a boys.(복수)

*복수형은 모두 Are 이다.
ex) We are boys.
       You are boys.
      They are boys.
He is/She is/It is의 복수는 모두 다 They are 이다.
ex)
He is a boy→They are boys.
She is a girl→They are girls.
It is a book→They are books.


be동사는 어떻게 변화하는가? [과거형]
               단수 복수
1인칭  I Was             We        Were
2인칭  You Were     You      Were
3인칭   He   Was      They   Were
           She
              It
*단수형은 1인칭•3인칭이 같다. Was
ex)
I was a boy.
He was a boy.
She was a girl.
It was a flower.

*복수형은 어느 인칭이나 다 Were
ex)
We were boys.
You were boys.
They were boys.

※회화에서는 줄여서 쓴다.
I am→I'm
We are→We're
You are→You're
They are→They're
He is→He's
She is→She's
It is→It's

Q. 나의 어머니는 늙으셨다.
-My mother am old. (O)
-My mother is old. (X)

Q. 우리들의 학교는 여기서 멀다.
-Our school are far from here. (X)
-Our school is far from here. (O)

Q. 그와 나는 키가 크다.
-He and I am tall. (X)
-He and I is tall. (X)
-He and I are tall. (O)