be動詞am/is/areは主語によって使い分けます。I→am、you/複数→are、三人称単数→is。肯定文・否定文・疑問文の作り方をまとめて解説します。
| 主語 | be動詞 |
|---|---|
| I | am |
| you (単数) | are |
| he / she / it | is |
| we | are |
| you (複数) | are |
| they | are |
短縮形: I'm, you're, he's / she's / it's, we're, they're
否定の短縮形: I'm not, you aren't / you're not, he isn't / he's not, we aren't / we're not, they aren't / they're not
He am a teacher.
He is a teacher.
解説: 三人称単数(he/she/it)には is を使います。
I is happy.
I am happy.
解説: 主語が I の時は am を使います。
They is students.
They are students.
解説: 複数主語(we/they)には are を使います。
He is student.
He is a student.
解説: 可算名詞の単数には a/an が必要です。
I am like coffee.
I like coffee.
解説: be動詞と一般動詞は一緒に使えません。
She not is busy.
She is not busy. / She isn't busy.
解説: not は be動詞の直後に置きます。