should placard
Regular verb: placard - placarded- placarded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should placard
you should placard
he should placard
we should placard
you should placard
they should placard 	I should be placarding
you should be placarding
he should be placarding
we should be placarding
you should be placarding
they should be placarding	I should have placarded
you should have placarded
he should have placarded
we should have placarded
you should have placarded
they should have placarded	I should have been placarding
you should have been placarding
he should have been placarding
we should have been placarding
you should have been placarding
they should have been placarding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not placard
you should not placard
he should not placard
we should not placard
you should not placard
they should not placard 	I should not be placarding
you should not be placarding
he should not be placarding
we should not be placarding
you should not be placarding
they should not be placarding	I should not have placarded
you should not have placarded
he should not have placarded
we should not have placarded
you should not have placarded
they should not have placarded	I should not have been placarding
you should not have been placarding
he should not have been placarding
we should not have been placarding
you should not have been placarding
they should not have been placarding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I placard?
should you placard?
should he placard?
should we placard?
should you placard?
should they placard? 	should I be placarding?
should you be placarding?
should he be placarding?
should we be placarding?
should you be placarding?
should they be placarding? 	should I have placarded?
should you have placarded?
should he have placarded?
should we have placarded?
should you have placarded?
should they have placarded? 	should I have been placarding?
should you have been placarding?
should he have been placarding?
should we have been placarding?
should you have been placarding?
should they have been placarding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not placard?
should you not placard?
should he not placard?
should we not placard?
should you not placard?
should they not placard? 	should I not be placarding?
should you not be placarding?
should he not be placarding?
should we not be placarding?
should you not be placarding?
should they not be placarding? 	should I not have placarded?
should you not have placarded?
should he not have placarded?
should we not have placarded?
should you not have placarded?
should they not have placarded? 	should I not have been placarding?
should you not have been placarding?
should he not have been placarding?
should we not have been placarding?
should you not have been placarding?
should they not have been placarding?