subjunctive mood
The subjunctive mood is a verb form that expresses a desire, assumption, doubt, or unreality of performing an action. If I were there I should ring you up. Если бы я был там, я бы позвонил тебе. I wish she would win the game. Мне бы хотелось, чтобы она выиграла игру. If I knew her address we should write to her . Если бы я знал её адрес, мы бы написали ей. It is necessary that he should go there. Необходимо, чтобы он поехал туда. the subjunctive mood can be expressed either with only one verb (were, wish, knew) — this is the so-called synthetic form, or with the auxiliary verb + infinitive without the particle to (should ring, would win, should write) - this is the analytical form. It is necessary that he start there immediately. (синтетическая форма ) Необходимо, чтобы он отправился туда немедленно. It’s a pity you can’t come tomorrow. He would help you. (аналитическая форма) Жаль, что вы не можете пр...