Question

where we use would , should, ought plzz answer I will mark as brainliest.

Answer 1

Would indicates general or repeated  willingness in the past. It also indicates preference in the present.  
Example:
If you did not leave, I would still be taking care of you.
Whenever I had to go there, they would throw a party.

Should indicates obligation and probability.
Example:
You should come home early.
You should not smoke at all.

Ought to sometimes replaces should.
Example:
You ought to come home early.
We ought to have taken a taxi. 

Hope it helps.....