“应该”的英文表达有：must、should、behove、ought to、be supposed to do
解析：
1、must
读音：英 [m?st]? 美 [m?st]
aux. 必须；应当；很可能
n. 必须做的事；未发酵的葡萄汁；发霉
One must honor his contract and keep his word.
任何人都应当尊重合同，信守诺言。
2、should
英 [??d]? 美 [??d]
aux. 应该；可能；应当；竟然；将要
Real friends should have everything in common.
真正的朋友应当共享一切。
3、behove
读音：英 [b?'h??v] 美 [b?'ho?v]
v. 理应；应该；有必要
=behoove(美).
It ill behoves Anne (ie She ought not) to speak thus of her benefactor.
安不应该这样谈论她的恩人。
4、ought to
读音：英 [??:t t?]? ?美 [?t tu]??
v.理应；应当，应该；宜
We ought to follow her good example.?
她是个好榜样，我们应当仿效她。
5、be supposed to do
读音：英 [bi: s??p??zd tu: du:]? ?美 [bi s??pozd tu du]??
应当，应该
I must write down each hour to be supposed to do any, perhaps I incompletely illuminate do, but must subscribe this plan.?
我要写下每个小时该干什么，也许我不完全照做，但还是要订下这个计划。
