shall:
Shall I close the door?
Shall we go...?
1. Thou Shalt Not Kill. = Sinun ei pidä tappaman. = Älä tapa.
2. You shall get your money back. LUPAUS
3. You shall perish. UHKAUS
They shall hear from me.

SHOULD
1. should = pitäisi
I should do my homework.

2. If someone should call me while I am gone tell them that I'll be back on Monday.
= Should someone call me...
= Jos joku sattuisi soittamaan minulle...

3. mielipidettä tai tunnetta ilmaisevien sanontojen jälkeen sivulauseessa should
It is a pity you should think so.
it is strange / it is interesting / it is a shame 
It is strange you should mention it.
It is a shame he should lose his job.

4. tiettyjen adjektiivien jälkeen sivulauseessa should
it is necessary / it is essential  / it is important / it is vital / it is better
It is necessary that everybody should have a job.

5. tiettyjen verbien jälkeen should
It was decided that Henry should be sent to Brussels.
suggest / agree / recommend / insist / request / propose
I suggest you should stay here.
They suggest he (should) be sent to Washington D.C. (amerikan englannissa subjunktiivi, joka on infinitiivin näköinen)