应该做

• be supposed to do sth.

例句

1. 他们对应该做什麽这一问题进行了长时间的争论。
   They disputed at great length what they should do.
2. 我们不能强迫你（去做），但认为你应该做。
   We cannot compel you to (do it), but we think you should.
3. 应该做什么和应该怎样做是完全不同的两个问题。
   What to do is one question, and how to do it is quite another.