1. Used to indicate ability or permission in the past.
Examples:I could run faster then.
Only men could go to there
She could sing like a pro by the age of 3.
2. Used with hypothetical or conditional force.
Examples:
If we could help, we would.
We could go on the trip if I didn't have to work this weekend.
3. Used to indicate tentativeness or politeness.
Examples:
I could be wrong.
Could you come over here?
4. It's also used to give a suggestion.
Examples:
You could see a movie or go out to dinner.
You could have spent your vacation in Hawaii.
WOULD
1. Used to express wish, desire or intent.
Examples:
She said she would meet us at the corner.
I would like to see you there tomorrow.
2. Used to make a polite request:
Example:
Would you go with me?
3. Used in the main clause of a conditional statement to express a possibility or likelihood.
Examples:
If I had enough money, I would buy a car.
We would have gone to the beach, had the weather been good.
If he were an actor, he would be in adventure movies.
4. Used to express presumption or expectation.
Example:
That would be Steve at the door.
5. Used to indicate uncertainty.
Example:
He would seem to be getting better.
6. Used to express repeated or habitual action in the past.
Examples:
Every morning we would walk in the garden.
When they first met, they would always have picnics on the beach.
SHOULD
1. Used to express obligation or duty.
Examples:
You should send her a note.
I really should be in the office by 7:00 AM.
2. Used to express probability or expectation.
Examples:
They should arrive at noon.
By now, they should already be in Singapore.
3. Used to express conditionality or contingency.
Example:
If she should fall, then so would I.
4. Used to moderate the directness or bluntness of a statement.
Example:
I should think he would like to go.
5. Used to give recommendation and advice.
Examples:
When you go to Berlin, you should visit the palaces in Potsdam.
You should focus more on your family and less on work
