Значение should в русском языке

• 0 used to say or ask what is the correct or best thing to do -- выражает рекомендацию должен, следует

  • He should have gone to the doctor.

  • Should I apologize to her?

  • You shouldn't be so angry with him.

• 1 used to say that you expect something to be true or that you expect something to happen -- выражает предположение должно быть, наверное

  • She should be feeling better by now.

  • The letter should arrive by Friday.

• 2 used to refer to a possible event in the future -- выражает возможность события в будущем если вдруг

  • Should you have any further queries, please do not hesitate to contact me.

  • I'll be in my office, if anyone should ask.

• 3 used to ask or give the reason for something, especially when you are surprised or angry about it -- но зачем это надо/а почему бы и нет?

  • He told me to forgive her, but why should I?