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Uses of ought to, should and would:

1. “Ought to” is often used to give positive/negative recommendation, advice against something and probability and expected outcome.
Note: “To” is omitted in negative statements.

Example 1
You ought not drink too much alcohol. (advice against something)
He ought to get the promotion. (expected outcome)
The price of oil ought to increase this year. (probability)
You ought to be there, it will be fun! (recommendation)


2. “Should” is often used to give advice, recommendation, expectation and
obligation.

Example 2: 
You should focus on your studies. (advice)
She should try doing Yoga. (recommendation)
He should be in the office now. (expectation)
You should return the books to the library. (obligation)

3. “Would” is often used as the past of “will”, for conditional sentences and
repetition.

Example 3: 
I knew she would pass the exam. (past)
If I were you, I would ask him to call me. (conditional)
When I was in New York, I would always drop by Times Square. (repetition)

-Hope this helps.
For more exercises, feel free to send me a message.