should yack
Verbe régulier : yack - yacked- yacked

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I should yack
you should yack
she should yack
we should yack
you should yack
they should yack 	I should be yacking
you should be yacking
she should be yacking
we should be yacking
you should be yacking
they should be yacking	I should have yacked
you should have yacked
she should have yacked
we should have yacked
you should have yacked
they should have yacked	I should have been yacking
you should have been yacking
she should have been yacking
we should have been yacking
you should have been yacking
they should have been yacking	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I should not yack
you should not yack
she should not yack
we should not yack
you should not yack
they should not yack 	I should not be yacking
you should not be yacking
she should not be yacking
we should not be yacking
you should not be yacking
they should not be yacking	I should not have yacked
you should not have yacked
she should not have yacked
we should not have yacked
you should not have yacked
they should not have yacked	I should not have been yacking
you should not have been yacking
she should not have been yacking
we should not have been yacking
you should not have been yacking
they should not have been yacking	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
should I yack?
should you yack?
should she yack?
should we yack?
should you yack?
should they yack? 	should I be yacking?
should you be yacking?
should she be yacking?
should we be yacking?
should you be yacking?
should they be yacking? 	should I have yacked?
should you have yacked?
should she have yacked?
should we have yacked?
should you have yacked?
should they have yacked? 	should I have been yacking?
should you have been yacking?
should she have been yacking?
should we have been yacking?
should you have been yacking?
should they have been yacking? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
should I not yack?
should you not yack?
should she not yack?
should we not yack?
should you not yack?
should they not yack? 	should I not be yacking?
should you not be yacking?
should she not be yacking?
should we not be yacking?
should you not be yacking?
should they not be yacking? 	should I not have yacked?
should you not have yacked?
should she not have yacked?
should we not have yacked?
should you not have yacked?
should they not have yacked? 	should I not have been yacking?
should you not have been yacking?
should she not have been yacking?
should we not have been yacking?
should you not have been yacking?
should they not have been yacking?