She felt unhappy after receiving the news about her job.
The sentence, 'Pity those who are unhappy.' is a correct sentence. The subject of the sentence is implied, the subject is 'you', the verb is 'pity'.
I am not happy nor am I unhappy.
He was happy, while on the otherhand she was unhappy. This is a sentence using the word on the otherhand.
The little league players were unhappy because their game was rained out. She's unhappy at work and should look for a new job. We planned a fun party, but were unhappy when not many people attended.
This is the season of our discontent means we are unhappy.
Grammer is correct or not for this sentence
I feel blue when i am sick and unhappy.
the organizers
The citizens started a revolution when they were unhappy with their government.
They decided to plunder the tents of the unhappy campers.
We are unhappy when uncongenial visitors protract their stay.