How would you say the Negation of following sentences?
- She is supposed to be happy.
- It is supposed to be hard.
- Tomorrow is supposed to be a off day.
- He is supposed to be there.
- He is supposed to know that.
- She is supposed to be able to come to party tomorrow.
I thought that just put "not" between verb to be and supposed, but according to my dictionary, "be not supposed to" expresses the prohibition. However the degree of prohibition is not strong compared with "must not" or "can not". For example,
- You are not supposed to smoke here.
- You are not supposed to use it.
These sentences express the "prohibition".
If my dictionary is true, when I say "She is not supposed to be happy", it would not make sense.
How should I say them? For example,
- She can't be happy.
- It can't be hard.
- Tomorrow may not be a off day.
- There's no way that he is there.
- There's no way that he knows that.
- She might be impossible to come to party tomorrow.
Are these correct?