DIFFERENCE BETWEEN "SUPPOSED TO" AND "EXPECTED TO"

These phrases are almost synonymous and there isn't much difference between them when they are used in a positive sense:

You are expected to (=should) finish your work before you leave.
You are supposed to (=should) finish your work before you leave.

They convey completely different meanings when they are used in a negative sense:

You are not supposed to (=should not/ prohibited to) use the office phone for your personal needs.
You are not expected to (do not have to) use your personal phone for official purposes.


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