Would VS Should

'Would' is the past tense (verb 2) of 'will'

To ask who, what, where, why, when, how questions

Like this: When would this lesson end?

To make a polite request or offer

Like this: Would you kindly pour me a drink?

Or this: Would you like some tea?

To talk about hypothetical (imaginary) situations

Like this: I would love to have a pet bear someday.

'should' is the past tense (Verb 2) of 'shall'

We use 'should' to show how something might happen.

Like this: The train should arrive in just a few more minutes.

We use 'should' to ask questions.

Like this: Should we turn left at this intersection?

To give a recommendation or an opinion.

Like this: I think you should concentrate on your studies more.

To show that something must be done.

Like this: I should go to school now, otherwise I'll be late.

'could' is the past tense (verb 2) of 'can'

We use 'could' to suggest a possibility.

Like this: It could start raining, just look at how dark the sky is.

We use 'could' to make a polite request.

Like this: Could you open the door for me?

It's easy to mix up would, could, and should

The best way to learn how to use them correctly is by practice

Not just by answering questions

But also by writing a lot