it was essential that the application forms be send back bef

1个回答

  • 跟什么从句没有关系,要看句字意思来理解.

    should 建议,应该.(You should go to school.事实上你 没去上学,你应当去上学)常用于称述句.

    would,尽管也是委婉的表达,但是表达征求意见,而不是建议,或要求.(would you go to school?,你愿意去上学吗?)常用于征求意见.

    按原文意思的理解,assential,是必要,不可缺少的,最重要的,并不是征求意见.

    还要可以再问.