Is "obligatory should" actually "subjunctive shall"?
1. Should is the past form of shell
2. Past form is sometimes used to indicate subjunctive mood. Such as "It's time you went to bed". (meaning obligation, or etc)
3. I've never thought like this and always deemed shall and should are two different things even though I know the fact that should is the past tense of shall.
4. So I was wondering, is this the true train of logic between the two words by any chance?