The group leader announced that we should (= would ) begin to work soon. 小组长宣布:我们不久就开始工作. A week ago,I told him that I should (= would) go to Beijing the next day. 一个星期以前,我告诉他我第二天就去北京. You should (= are supposed to ) complete your test in time. 你们应该按时做完你们的实验. You should (= ought to ) tell your mother about it at once. 你应该立即把此事告诉你妈妈. In sum,theory should be combined with practice. 总之,理论应该与实验相结合.