should chalk
Regular verb: chalk - chalked- chalked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should chalk
you should chalk
he should chalk
we should chalk
you should chalk
they should chalk 	I should be chalking
you should be chalking
he should be chalking
we should be chalking
you should be chalking
they should be chalking	I should have chalked
you should have chalked
he should have chalked
we should have chalked
you should have chalked
they should have chalked	I should have been chalking
you should have been chalking
he should have been chalking
we should have been chalking
you should have been chalking
they should have been chalking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not chalk
you should not chalk
he should not chalk
we should not chalk
you should not chalk
they should not chalk 	I should not be chalking
you should not be chalking
he should not be chalking
we should not be chalking
you should not be chalking
they should not be chalking	I should not have chalked
you should not have chalked
he should not have chalked
we should not have chalked
you should not have chalked
they should not have chalked	I should not have been chalking
you should not have been chalking
he should not have been chalking
we should not have been chalking
you should not have been chalking
they should not have been chalking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I chalk?
should you chalk?
should he chalk?
should we chalk?
should you chalk?
should they chalk? 	should I be chalking?
should you be chalking?
should he be chalking?
should we be chalking?
should you be chalking?
should they be chalking? 	should I have chalked?
should you have chalked?
should he have chalked?
should we have chalked?
should you have chalked?
should they have chalked? 	should I have been chalking?
should you have been chalking?
should he have been chalking?
should we have been chalking?
should you have been chalking?
should they have been chalking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not chalk?
should you not chalk?
should he not chalk?
should we not chalk?
should you not chalk?
should they not chalk? 	should I not be chalking?
should you not be chalking?
should he not be chalking?
should we not be chalking?
should you not be chalking?
should they not be chalking? 	should I not have chalked?
should you not have chalked?
should he not have chalked?
should we not have chalked?
should you not have chalked?
should they not have chalked? 	should I not have been chalking?
should you not have been chalking?
should he not have been chalking?
should we not have been chalking?
should you not have been chalking?
should they not have been chalking?