would是will的过去式,可以做助动词,情态动词
比如I would like to go shoping 我想去购物,这里的would是一种委婉的说法
还有用在虚拟语气中I would have been caugh in rain if I had taken umbrella with me我如果带了伞就不会淋湿了.
还可以是He aksed me if I would go to his house next day他问我明天去不去他家,这里的would是will的过去式
would在英语中随处可见,不同地方的含义不同.