Homework(29/1)
학생이 쓴 원문
A. Put in \'can\', \'can\'t\', \'could\' or \'couldn\'t\'. If none of these is possible use \'be able to\' in the correct tense.
1. When the car broke down I was really pleased because i could solve the problem.
2. Julian could play excellent golf when he was only ten.
3. My grandmother was able to use a computer until last month. Since then she\'s been taking lessons at the library.
4. I can\'t open this window! I think it\'s stuck.
5. Gill can play the piano. She has never studied it.
B. Put in \'mustn\'t\' or \'don\'t / doesn\'t have to\'.
1. We have a lot of work tomorrow. You don\'t have to be late.
2. You must not tell anyone what I just told you. It\'s a secret.
3. The museum is free. You have to pay to get in.
4. Children must not tell lies. It\'s very naughty.
5. John\'s a millionaire. He doesn\'t have to go to work.
강사 첨삭
Hello, Hyun!
You’re doing well recognizing when to use can/could for ability and mustn’t/don’t have to for rules or necessity. Just be careful: don’t have to means “it’s not necessary,” while mustn’t means “it’s forbidden.” Keep practicing with real-life examples, like: “I don’t have to cook tonight because we ordered food” vs. “You mustn’t touch the stove because it’s hot.”
Please review the corrections. Remember that modals show ability, possibility, or necessity, so choosing the right one makes your sentences clearer.
~ Trixia
CONTENT:
A. Ability (can / could / be able to)
1. I could solve the problem
~ I was able to solve the problem
2. Julian could play excellent golf when he was only ten.
~ CORRECT
3. My grandmother was able to use a computer until last month.
~ My grandmother couldn’t use a computer until last month
4. I can\'t open this window! I think it\'s stuck.
~ CORRECT
5. Gill can play the piano. She has never studied it.
~ Gill can’t play the piano. She has never studied it
Obligation / Prohibition (mustn\'t / don\'t have to)
1. You don\'t have to be late.
~ You mustn’t be late
2. You must not tell anyone what I just told you. It\'s a secret.
~ CORRECT
3. You have to pay to get in.
~ You don’t have to pay to get in
4. Children must not tell lies. It\'s very naughty.
~ CORRECT
5. He doesn\'t have to go to work.
~ CORRECT
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