I am confused between
You should do this
You should have to do this
Can anyone explain difference between these sentences.
This is the first two meanings of should in action:
Used to indicate obligation, duty, or correctness, typically when criticizing someone's actions.
Used to indicate what is probable.
So in the first example, "You should do this," the should is the first meaning. In other words, "it would be best if you did this."
In the second example, "You should have to do this," the should is the second meaning, making a prediction. In other words, "I predict that you will have to do this.