should duck
Regular verb: duck - ducked- ducked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should duck
you should duck
he should duck
we should duck
you should duck
they should duck 	I should be ducking
you should be ducking
he should be ducking
we should be ducking
you should be ducking
they should be ducking	I should have ducked
you should have ducked
he should have ducked
we should have ducked
you should have ducked
they should have ducked	I should have been ducking
you should have been ducking
he should have been ducking
we should have been ducking
you should have been ducking
they should have been ducking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not duck
you should not duck
he should not duck
we should not duck
you should not duck
they should not duck 	I should not be ducking
you should not be ducking
he should not be ducking
we should not be ducking
you should not be ducking
they should not be ducking	I should not have ducked
you should not have ducked
he should not have ducked
we should not have ducked
you should not have ducked
they should not have ducked	I should not have been ducking
you should not have been ducking
he should not have been ducking
we should not have been ducking
you should not have been ducking
they should not have been ducking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I duck?
should you duck?
should he duck?
should we duck?
should you duck?
should they duck? 	should I be ducking?
should you be ducking?
should he be ducking?
should we be ducking?
should you be ducking?
should they be ducking? 	should I have ducked?
should you have ducked?
should he have ducked?
should we have ducked?
should you have ducked?
should they have ducked? 	should I have been ducking?
should you have been ducking?
should he have been ducking?
should we have been ducking?
should you have been ducking?
should they have been ducking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not duck?
should you not duck?
should he not duck?
should we not duck?
should you not duck?
should they not duck? 	should I not be ducking?
should you not be ducking?
should he not be ducking?
should we not be ducking?
should you not be ducking?
should they not be ducking? 	should I not have ducked?
should you not have ducked?
should he not have ducked?
should we not have ducked?
should you not have ducked?
should they not have ducked? 	should I not have been ducking?
should you not have been ducking?
should he not have been ducking?
should we not have been ducking?
should you not have been ducking?
should they not have been ducking?