should underline
Regular verb: underline - underlined- underlined

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd underline
you'd underline
she'd underline
we'd underline
you'd underline
they'd underline 	I'd be underlining
you'd be underlining
she'd be underlining
we'd be underlining
you'd be underlining
they'd be underlining	I should've underlined
you should've underlined
she should've underlined
we should've underlined
you should've underlined
they should've underlined	I should've been underlining
you should've been underlining
she should've been underlining
we should've been underlining
you should've been underlining
they should've been underlining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't underline
you shouldn't underline
she shouldn't underline
we shouldn't underline
you shouldn't underline
they shouldn't underline 	I shouldn't be underlining
you shouldn't be underlining
she shouldn't be underlining
we shouldn't be underlining
you shouldn't be underlining
they shouldn't be underlining	I shouldn't have underlined
you shouldn't have underlined
she shouldn't have underlined
we shouldn't have underlined
you shouldn't have underlined
they shouldn't have underlined	I shouldn't have been underlining
you shouldn't have been underlining
she shouldn't have been underlining
we shouldn't have been underlining
you shouldn't have been underlining
they shouldn't have been underlining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I underline?
should you underline?
should she underline?
should we underline?
should you underline?
should they underline? 	should I be underlining?
should you be underlining?
should she be underlining?
should we be underlining?
should you be underlining?
should they be underlining? 	should I have underlined?
should you have underlined?
should she have underlined?
should we have underlined?
should you have underlined?
should they have underlined? 	should I have been underlining?
should you have been underlining?
should she have been underlining?
should we have been underlining?
should you have been underlining?
should they have been underlining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I underline?
shouldn't you underline?
shouldn't she underline?
shouldn't we underline?
shouldn't you underline?
shouldn't they underline? 	shouldn't I be underlining?
shouldn't you be underlining?
shouldn't she be underlining?
shouldn't we be underlining?
shouldn't you be underlining?
shouldn't they be underlining? 	shouldn't I have underlined?
shouldn't you have underlined?
shouldn't she have underlined?
shouldn't we have underlined?
shouldn't you have underlined?
shouldn't they have underlined? 	shouldn't I have been underlining?
shouldn't you have been underlining?
shouldn't she have been underlining?
shouldn't we have been underlining?
shouldn't you have been underlining?
shouldn't they have been underlining?