否定文

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■be動詞・助動詞の文
☆ be動詞 ⇒ be動詞 + not
              is → is not (isn't)
☆ 助動詞 ⇒ 助動詞 + not
              can → cannot (can't)

I am not a teacher.
I can't speak English.


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■一般動詞の文
☆ do (does, did) + not + 動詞の原形
make → do not make (don't make)
knows → does not know (doesn't know)

I do not open the door.


do が 一般動詞「する」の意味で使われるとき、
I did my homework.（ 私は宿題をした。）
→○ I didn't do my homework.
　× I didn't my homework.


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■関連