What does this sign express: Obligation, prohibition, or permission?
Obligation (you must stop)
What does this sign express: Obligation, prohibition, or permission?
Obligation (you must slow down)
What does this sign express: Obligation, prohibition, or permission?
Obligation (you must only go this way)
What does this sign express: Obligation, prohibition, or permission?
Prohibition (you may not enter this way)
What does this sign express: Obligation, prohibition, or permission?
Permission (you may press this button for attention)
What does this sign express: Obligation, prohibition, or permission?
Prohibition (you may not cross the road)
What does this sign express: Obligation, prohibition, or permission?
Prohibition (you may not go faster than 40 mph) or Obligation (you must go slower than 40 mph)
What does this sign express: Obligation, prohibition, or permission?
Permission (you may cross the road)
What does this sign express: Obligation, prohibition, or permission?
Prohibition (no parking here)
What does this sign express: Obligation, prohibition, or permission?
Prohibition (no parking around this sign)
What does this sign express: Obligation, prohibition, or permission?
Permission (you may come in)
Complete the sentence: "You ____________ climb up the volcano today; there's smoke near the top."
shouldn't / mustn't / can’t / are not allowed to
Complete the sentence: "The door isn't locked, so you ________ come in any time you want."
can / may
Complete the sentence: "If you want to work at a construction site, you ___________ wear a hat and gloves."
must / have to / need to
Complete the sentence: "You __________ get water from that tap. It's not safe to drink!"
shouldn’t / mustn't / can't
Complete the sentence: "My best friend is in the hospital. I _______ go visit him to cheer him up."
should / ought to
