Past tense is the future perfect tense is used to express
something that's been happening, but it WILL but its position would have been
passed.
Formula :
·
Verbal :
(+)
S + Would/Should + Have + V3 + O + ANA
(-)
S + Would/Should+ Not + Have + V3 + O + ANA
(?)
Would/Should + S + Have + V3 + O + ANA
Example :
(+)
She would have come here if she had called him.
(-)
She wouldn’t have come here if she had not called him.
(?)
would she have come here if she had called him ?
·
Nominal :
(+)
S + Would/Should + Have + Been + O + ANA
(-)
S + Would/Should + Not + Have + Been + O + ANA
(?)
Would/Should + S + Have + Been + O + ANA
Example :
(+)
I should have been at Studio if they had invited me.
(-)
I should not have been at Studio if they had not invited me.
(?)
should you have been at Studio there if they had invited me ?