如果问起should的同义词有什么，很多同学都能回答ought to或者be supposed to。的确这三个词都可以翻译成“应该”，但即便是中文的“应该”在不同的语境下也有不一样的意思，所以，如果在should， ought to和be supposed to 之间随意替换的话，后果一定很严重。因此，建议同学们要根据不同情况，准确理解相关的语境来实现含should句子的paraphrase。

　　Should一个常见的意思就是表示责任和义务，在这种情况下should + do 就可以轻松替换为有责任/义务做某事，英文最常用的表达是：have / has the responsibility/duty/moral obligation to do something.

　　例如1

　　Parents should teach children how to be good members of society.

　　可改为：

　　Parents have the responsibility/duty to teach children how to be useful members of society.

　　例如2

　　Government should pay for public health care and education.

　　可改为：

　　Government has the responsibility / duty to bear the cost of public health care and education.

　　Should do 在雅思写作中的另一个常见意思是表示“这么做有好处”。

　　例如以下两句

　　Young people should work or travel for a year between finishing high school and starting university studies.

　　Intelligent children should be taught separately and given special treatment.

　　显然这两个should不是表示某种责任，而是表示should 后面的这个动作能够带来好处，那么，用有关“好处”的表达来改写这两个句子是最明智的。

　　首先我们可以用：

　　Working or traveling for a year before starting university studies will be beneficial for high school graduates.

　　Teaching intelligent children separately and giving them special treatment will be beneficial to the society as a whole.

　　通过词性的合理转化我们又可以变化出下面的句子：

　　Working or travelling for a year before starting university studies will benefit high school graduates a lot.

　　这个句子意思上等于：

　　High school graduates will benefit a lot from working or traveling for a year before starting their university studies.

　　Teaching intelligent children separately and giving them special treatment will benefit the society as a whole.

　　这个句子意思上等于：

　　The whole society will benefit a lot from the policy of teaching intelligent children separately and giving them special treatment.

　　有关“A 对B 有好处”的表达，还有如下选择：

　　A is helpful to B;

　　By A / doing A, B can enjoy many advantages;

　　A can bring plenty of benefits to B

　　总之，在对含有should的句子进行替换表达的时候，首先要做的事情就是要准确理解句子的内在含义，切忌不顾一切为了避免重复随意用be supposed to和ought to来替换。通常在雅思写作中基本上不会有适合be supposed to 的语境。Ought to一般也只在表达“责任”和“义务”的时候适合使用。Paraphrase时只有通过理解句子的意思来替换表达才显得更灵活而不生硬。如果想了解更多关相关信息，请关注启德考培宁波分校平台，免费获取备考提分解决方案，或欢迎 点击这里 进行网络咨询，我们会给您提供专业的服务。最后，预祝大家能在托福考试中取得理想中的成绩。