should croak
Regular verb: croak - croaked- croaked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should croak
you should croak
she should croak
we should croak
you should croak
they should croak 	I should be croaking
you should be croaking
she should be croaking
we should be croaking
you should be croaking
they should be croaking	I should have croaked
you should have croaked
she should have croaked
we should have croaked
you should have croaked
they should have croaked	I should have been croaking
you should have been croaking
she should have been croaking
we should have been croaking
you should have been croaking
they should have been croaking	

Negation 	
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I should not croak
you should not croak
she should not croak
we should not croak
you should not croak
they should not croak 	I should not be croaking
you should not be croaking
she should not be croaking
we should not be croaking
you should not be croaking
they should not be croaking	I should not have croaked
you should not have croaked
she should not have croaked
we should not have croaked
you should not have croaked
they should not have croaked	I should not have been croaking
you should not have been croaking
she should not have been croaking
we should not have been croaking
you should not have been croaking
they should not have been croaking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I croak?
should you croak?
should she croak?
should we croak?
should you croak?
should they croak? 	should I be croaking?
should you be croaking?
should she be croaking?
should we be croaking?
should you be croaking?
should they be croaking? 	should I have croaked?
should you have croaked?
should she have croaked?
should we have croaked?
should you have croaked?
should they have croaked? 	should I have been croaking?
should you have been croaking?
should she have been croaking?
should we have been croaking?
should you have been croaking?
should they have been croaking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not croak?
should you not croak?
should she not croak?
should we not croak?
should you not croak?
should they not croak? 	should I not be croaking?
should you not be croaking?
should she not be croaking?
should we not be croaking?
should you not be croaking?
should they not be croaking? 	should I not have croaked?
should you not have croaked?
should she not have croaked?
should we not have croaked?
should you not have croaked?
should they not have croaked? 	should I not have been croaking?
should you not have been croaking?
should she not have been croaking?
should we not have been croaking?
should you not have been croaking?
should they not have been croaking?