Expressing Ability, Permission, and Obligation
1. Be Able to
- Example: "From tomorrow, we won't be able to park in this street."
- Usage: "Be able to" is often used to express the possibility or ability to do something in the future.
2. Be Allowed to and Be Permitted to
- Examples:
- "You're not allowed to smoke in any public buildings in our country."
- "It is not permitted to take phones into the exam room."
- Usage: Both "be allowed to" and "be permitted to" indicate permission. They are often used in formal contexts, with "permitted to" typically used in official notices or legal language.
3. Be Supposed to / Be Meant to
- Examples:
- "We are supposed to check out by 12:00. What's the time now?"
- "You aren't supposed to park here; it's reserved for teachers."
- Usage: "Be supposed to" or "be meant to" indicate what is expected of someone, often due to rules or obligations. There's usually an implication that these rules may not always be followed:
- "Students are not supposed to have guests after 12:00, but everyone does."
Key Points
1. Alternatives to "Can":
- Instead of using "can," the structure "person + be able to" or "be allowed to + infinitive" can be used to discuss abilities and permissions.
2. Formal Situations:
- The phrase "it + be permitted to + infinitive" is often used in formal contexts, such as signs or official announcements, to indicate what is allowed or not allowed. For example: "It is not permitted to take phones into the exam room."
- It's essential to note that "it isn't allowed to..." is incorrect; the correct form is "it is not permitted to..."
3. Indicating Expectations:
- "Be supposed to" or "be meant to" can convey expectations or rules about behavior. However, these expressions often suggest that the rules may be ignored or not strictly adhered to.
Summary
In summary, the phrases "be able to," "be allowed to," "be permitted to," and "be supposed / meant to" are useful for expressing ability, permission, and obligations. Understanding their nuances helps communicate effectively regarding what is possible, permitted, and expected.