should tree
Regular verb: tree - treed- treed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should tree
you should tree
he should tree
we should tree
you should tree
they should tree 	I should be treeing
you should be treeing
he should be treeing
we should be treeing
you should be treeing
they should be treeing	I should have treed
you should have treed
he should have treed
we should have treed
you should have treed
they should have treed	I should have been treeing
you should have been treeing
he should have been treeing
we should have been treeing
you should have been treeing
they should have been treeing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not tree
you should not tree
he should not tree
we should not tree
you should not tree
they should not tree 	I should not be treeing
you should not be treeing
he should not be treeing
we should not be treeing
you should not be treeing
they should not be treeing	I should not have treed
you should not have treed
he should not have treed
we should not have treed
you should not have treed
they should not have treed	I should not have been treeing
you should not have been treeing
he should not have been treeing
we should not have been treeing
you should not have been treeing
they should not have been treeing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I tree?
should you tree?
should he tree?
should we tree?
should you tree?
should they tree? 	should I be treeing?
should you be treeing?
should he be treeing?
should we be treeing?
should you be treeing?
should they be treeing? 	should I have treed?
should you have treed?
should he have treed?
should we have treed?
should you have treed?
should they have treed? 	should I have been treeing?
should you have been treeing?
should he have been treeing?
should we have been treeing?
should you have been treeing?
should they have been treeing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not tree?
should you not tree?
should he not tree?
should we not tree?
should you not tree?
should they not tree? 	should I not be treeing?
should you not be treeing?
should he not be treeing?
should we not be treeing?
should you not be treeing?
should they not be treeing? 	should I not have treed?
should you not have treed?
should he not have treed?
should we not have treed?
should you not have treed?
should they not have treed? 	should I not have been treeing?
should you not have been treeing?
should he not have been treeing?
should we not have been treeing?
should you not have been treeing?
should they not have been treeing?