1、He should have been more careful.
2、Should I call him and apologize?
3、I should have finished the book by Friday.
4、The bus should have arrived ten minutes ago.
5、If I were asked to work on Sundays, I should resign.
6、If you should change your mind, do let me know.
7、I said (that) I should be glad to help.
8、She recommended that I should take some time off.
9、I find it astonishing that he should be so rude to you.
10、We should be grateful for your help.
11、I should imagine it will take about three hours.
12、Why should I help him? He's never done anything for me.
13、You should have seen her face when she found out!