Would
Мы употребляем Would в следующих ситуациях:
Когда говорим о предположениях.
                Когда мы воображаем ситуацию или действие.
                It would be nice to buy a new iPhone, but it's too expensive for me.
                It would be very expensive to stay in a hotel.
                I'd love to live by the sea.
                "Shall I tell Chris what happened?" "No, I wouldn't say anything."
                Когда мы воображаем ситуацию или действие в прошлом (для событий, которые не произошли) мы используем форму perfect.
                They helped us a lot. I don't know what we would have done without their help.
                I didn't tell Sam what happened. He wouldn't have been pleased.
                I would have phoned Helen, but I lost her number with my phone.
                Мы часто употребляем would в условных предложениях.
                I would phone Helen if I didn't loose her number.
                I would have phoned Helen if I hadn't lost her number.
                If he got a good job he would make more money.
            Когда мы говорим о прошлом.
                Мы используем would как прошедшее время от will:
                Tom said he would phone me on Sunday.
                I thought I would be late.
                Ann promised that she wouldn't be late.
                She shouldn't have been listening to our conversation. It was private.
                wouldn't do something означает отказаться что-либо делать:
                I tried to warn him, but he wouldn't listen to me.
                The car wouldn't start.
                Иногда, мы используем would для регулярно повторяющихся событий в прошлом:
                When we were young, we lived by the sea. In summer, even if the weather was not fine, we would all get up early and go for a swim.
                Whenever Richard was angry, he would walk out of the room.
                В этом случае, would имеет то же значение, что и used to:
                Whenever Richard was angry, he used to walk out of the room.
            При вежливом обращении.
                would you ...? для просьбы:
                Would you please help us?
                Would you carry this for me please?
                Would you mind not telling him that?
                would you like ...? для предложений и приглашений:
                Would you like to join us?
                Would you like another drink?
                I would like ... чтобы сказать что вам хочется:
                I'd like that one please.
                I would like you to say truth.
                I'd like to go out from here.
                I would rather ... чтобы сказать что вы препочитаете:
                I'd rather have that one.
                I'd rather go out from here.
                I would think, I would imagine, I would guess чтобы дать понять, что вы не уверены в своем мнении или для большей вежливости:
                I would think that's the right answer.
                It's very difficult I would imagine.