should undulate
Regular verb: undulate - undulated- undulated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should undulate
you should undulate
she should undulate
we should undulate
you should undulate
they should undulate 	I should be undulating
you should be undulating
she should be undulating
we should be undulating
you should be undulating
they should be undulating	I should have undulated
you should have undulated
she should have undulated
we should have undulated
you should have undulated
they should have undulated	I should have been undulating
you should have been undulating
she should have been undulating
we should have been undulating
you should have been undulating
they should have been undulating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not undulate
you should not undulate
she should not undulate
we should not undulate
you should not undulate
they should not undulate 	I should not be undulating
you should not be undulating
she should not be undulating
we should not be undulating
you should not be undulating
they should not be undulating	I should not have undulated
you should not have undulated
she should not have undulated
we should not have undulated
you should not have undulated
they should not have undulated	I should not have been undulating
you should not have been undulating
she should not have been undulating
we should not have been undulating
you should not have been undulating
they should not have been undulating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I undulate?
should you undulate?
should she undulate?
should we undulate?
should you undulate?
should they undulate? 	should I be undulating?
should you be undulating?
should she be undulating?
should we be undulating?
should you be undulating?
should they be undulating? 	should I have undulated?
should you have undulated?
should she have undulated?
should we have undulated?
should you have undulated?
should they have undulated? 	should I have been undulating?
should you have been undulating?
should she have been undulating?
should we have been undulating?
should you have been undulating?
should they have been undulating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not undulate?
should you not undulate?
should she not undulate?
should we not undulate?
should you not undulate?
should they not undulate? 	should I not be undulating?
should you not be undulating?
should she not be undulating?
should we not be undulating?
should you not be undulating?
should they not be undulating? 	should I not have undulated?
should you not have undulated?
should she not have undulated?
should we not have undulated?
should you not have undulated?
should they not have undulated? 	should I not have been undulating?
should you not have been undulating?
should she not have been undulating?
should we not have been undulating?
should you not have been undulating?
should they not have been undulating?