perfect modals - viven and sindy

1. Perfect Modals
Should have +past participle
Could have +past participle
Viven / Sindy from 5C

2. Should + have + past perfect
[ Rules ]
+ Talk about unfulfilled obligations in the past
[ Example ]
+ You should have returned the book to the library on tim
e. Now, you have to pay a fine.
Reference : http://www.slideshare.net/girmak/perfect-modals-presentationfinalversion

3. Should + have + past perfect
[ Rules ]
+ Talk about regrets
[ Example ]
+ I failed the test. I should have studied more I guess.
Reference : http://www.slideshare.net/girmak/perfect-modals-presentationfinalversion

4. Could have past perfect
They use this
[ Rule ]
+ Show we had the ability or the opportunity to do som-ethi
ng in the past but we did not do it.
[ Example ]
+ I could have studied law at university, but I didn't want to.
Reference : http://www.slideshare.net/girmak/perfect-modals-presentationfinalversion

5. Could have past perfect
[ Rule ]
+ Show a suggestion that was not taken
[ Example ]
+ You could have asked for our help or you could have as
ked the manager to assign you to a different task. Why
didn't you?
Reference : http://www.slideshare.net/girmak/perfect-modals-presentationfinalversion

6. Could have past perfect
[ Rule ]
+Show an action that almost happened, but didn't
[ Example ]
+Be careful! That car could have knocked your over!
Reference : http://www.slideshare.net/girmak/perfect-modals-presentationfinalversion