will 将要,一般将来时用 He will go on studying after graduation.
would 1.将要,过去将来时,He would go on studying when he had graduated.2.过去常常会 He would go fishing at that time.他那时经常去钓鱼.3 I would like.
shall 1.将要,一般将来时,用于主语是第一人称的时候 I shall...或者we shall...2.应该,较少用,基本上可以不用就不用.
should 1.将要shall的过去时 ,用法同shall 2.“应该”,主语随便是第一二三人称,都可以,较常用.
can 可以(表示被允许)、能够(表示能力上的).
could意思和can一样,是can的过去时.另外,用于Could you please.的句型,表示建议别人做某事.