Should is mainly used to talk about obligation. Would is used to talk about past habits. Should is also used as the past form of shall and would is used as the past form of will.
Complete the following sentences using should or would.
Answers
1. Everyone should wear a helmet. (obligation)
2. When we were kids we would spend hours playing caroms. (past habits)
3. I told him that I would / should probably be late.
4. We should / would be grateful for an early reply. (Note that in American English, should is not normally used in this situation.)
5. Should I open the door?
6. If we all sang in tune, it wouldn’t be so bad.
7. Should I turn the heating on?
8. Should we invite Judy?
9. Would you mind moving a bit?
10. She should be informed.

