should trouble
Regular verb: trouble - troubled- troubled

Affirmation 	
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I should trouble
you should trouble
he should trouble
we should trouble
you should trouble
they should trouble 	I should be troubling
you should be troubling
he should be troubling
we should be troubling
you should be troubling
they should be troubling	I should have troubled
you should have troubled
he should have troubled
we should have troubled
you should have troubled
they should have troubled	I should have been troubling
you should have been troubling
he should have been troubling
we should have been troubling
you should have been troubling
they should have been troubling	

Negation 	
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I should not trouble
you should not trouble
he should not trouble
we should not trouble
you should not trouble
they should not trouble 	I should not be troubling
you should not be troubling
he should not be troubling
we should not be troubling
you should not be troubling
they should not be troubling	I should not have troubled
you should not have troubled
he should not have troubled
we should not have troubled
you should not have troubled
they should not have troubled	I should not have been troubling
you should not have been troubling
he should not have been troubling
we should not have been troubling
you should not have been troubling
they should not have been troubling	

Interrogative form 	
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should I trouble?
should you trouble?
should he trouble?
should we trouble?
should you trouble?
should they trouble? 	should I be troubling?
should you be troubling?
should he be troubling?
should we be troubling?
should you be troubling?
should they be troubling? 	should I have troubled?
should you have troubled?
should he have troubled?
should we have troubled?
should you have troubled?
should they have troubled? 	should I have been troubling?
should you have been troubling?
should he have been troubling?
should we have been troubling?
should you have been troubling?
should they have been troubling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not trouble?
should you not trouble?
should he not trouble?
should we not trouble?
should you not trouble?
should they not trouble? 	should I not be troubling?
should you not be troubling?
should he not be troubling?
should we not be troubling?
should you not be troubling?
should they not be troubling? 	should I not have troubled?
should you not have troubled?
should he not have troubled?
should we not have troubled?
should you not have troubled?
should they not have troubled? 	should I not have been troubling?
should you not have been troubling?
should he not have been troubling?
should we not have been troubling?
should you not have been troubling?
should they not have been troubling?