There are many expressions commonly used in English to express similarity.
There is no magic rule to help you remember them. You just have to learn them. Sorry!
Take a look at the examples below.
To be like a breath of fresh air.
This phrase is used to describe someone or something that is new, refreshing and pleasantly different.
E.g. The new boss is like a breath of fresh air. He is full of good ideas and has a fresh approach to solving the problems within the department.
Like a bull in a china shop.
This is used to describe a person who behaves clumsily, aggressively or without tact in a situation that requires a more delicate or considered approach.
E.g. You can’t attack this problem like a bull in a china shop. It’s very complicated and we need to take our time to work out the best solution.
Have fun learning English!
Louise