Is it correct if somebody uses "can have had" instead of "may have had"?
- I can have called him yesterday, but I don't remember speaking to him.
- She can have done it but without proof we can't say for sure.
Does changing it from Past Perfect to Pluperfect change the meaning?
- I could have called him yesterday, but I don't remember speaking to him.
- She could have done it but without proof we can't say for sure.
Do "would" and "should" of the "Pluperfect" have similar in "Past Perfect"? While may (Past perfect) = might (Pluperfect) and can (Past perfect) = could (Pluperfect), what do would (Pluperfect) and should (Pluperfect) equal?