Can-Can't/
Could-Couldn't
Could-Couldn't
Penguins _________ swim very well because they live near the ocean.
Penguins CAN swim very well because they live near the ocean.
If you're happy with your job, you __________ change it.
If you're happy with your job, you SHOULDN'T change it.
If I want my hamster to live, I ________ feed him every day.
If I want my hamster to live, I HAVE TO feed him every day.
You ______ smoke in indoor public areas because it's illegal.
You MUSTN'T smoke in indoor public areas because it's illegal.
__________ you play the piano when you were seven?
COULD you play the piano when you were seven?
When you have an illness, you __________ visit the doctor's office.
When you have an illness, you SHOULD visit the doctor's office.
The teacher __________ send a text message to the students after work hours.
The teacher DOESN'T HAVE TO send a text message to the students after work hours.
The students _______ wear the school uniform because it is a school rule.
The students MUST wear the school uniform because it is a school rule.
It's snowing right now, so we __________ go to the beach.
It's snowing right now, so we CAN'T go to the beach.
You _______ drink so much coffee because it is bad for your blood pressure.
You SHOULDN'T drink so much coffee because it is bad for your blood pressure.
My brother ________ clean his desk if he wants to be organized.
My brother HAS TO clean his desk if he wants to be organized.
My sister and brother _______ come home on time or my parents will get really angry.
My sister and brother MUST come home on time or my parents will get really angry.
He had a broken leg, so he __________ walk for a few days last week.
He had a broken leg, so he COULDN'T walk for a few days last week.
You _________ ask help from your teacher if you don't understand something in the class.
You SHOULD ask help from your teacher if you don't understand something in the class.
Pizza tastes best when it's hot, but you ________ eat hot pizza. You can eat it cold too.
Pizza tastes best when it's hot, but you DON'T HAVE TO eat hot pizza. You can eat it cold too.
You ______ bite and eat your nails because they will make your stomach sick.
You MUSTN'T bite and eat your nails because they will make your stomach sick.
In 1870 they ________ listen to the radio because there was no electricity, but now we _________ listen to the radio and even watch TV.
In 1870 they COULDN'T listen to the radio because there was no electricity, but now we CAN listen to the radio and even watch TV.
Do you think _______ I apply for that job?
Do you think SHOULD I apply for that job?
When you're making a milkshake, you _________ have milk but you _________ put strawberries in it; you can use any fruit you want.
When you're making a milkshake, you HAVE TO have milk but you DON'T HAVE TO put strawberries in it; you can use any fruit you want.
You _______ cheat during a test but you ______ be a careful student if you want to pass your test.
You MUSTN'T cheat during a test but you MUST be a careful student if you want to pass your test.