Meaning: thinking of some impossible task. Make plans or hopes that have very little chance of happening.

Example:
1. She keeps talking about her big-time ambitions, but it's all castles in the air.
2. Don't build castles in the air, just and find some work to earn money.

Meaning: argue jealously and violently all the time.

Example:
Both of the children of Mrs. Bector in our neighborhood fight like cat and dog.

Meaning: to do things in the wrong order or sequence. To do something in wrong manner.

Example:
1. Aren't you putting the cart before the horse in decorating your new office? You haven't even been awarded the job yet.
2. Don't put the cart before the horse by investing in a new shop before selling that old one situated in west of the city.

Meaning: mixture of rewards and punishments. To use a reward to appreciate someone's work and punishment to demotivate certain behaviours

Example:
1. He said the carrot and stick approach is in effective when it comes to management.
2. Some schools prefer the carrot and stick method when it comes to education.