The word "should" is correct and usable in written English. You can use it to express a recommendation or expectation, or in questions expecting a specific answer. Example sentence: What should I do if the package doesn't arrive on time?.
And that is as it should be.
Should it?
So he should.
And he should know.
But should they?
So it should.
I wanted to give society a chance to determine if it should change itself.
Awesome tool! I started using it one year ago and I never had to look for another app
Ha Thuy Vy
MA of Applied Linguistic, Maquarie University, Australia