I am very confused with the following sentences:
You would better go to sleep.
You better go to sleep.
You had better go to sleep.
Which one is correct?
When do we use 'd better and better?
The first is incorrect. It could be "You would be better off (going to)/(if you went to) sleep. That uses "better off" as an idiom for "in a better position" or "advantaged".Originally Posted by bread
The second two uses are acceptable in informal usage. They use "better" or "had better" as an auxiliary verb to indicate "obligation" or "advice".
Pope of the Dictionary.com Forum