should signal
Regular verb: signal - signalled- signalled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should signal
you should signal
he should signal
we should signal
you should signal
they should signal 	I should be signalling
you should be signalling
he should be signalling
we should be signalling
you should be signalling
they should be signalling	I should have signalled
you should have signalled
he should have signalled
we should have signalled
you should have signalled
they should have signalled	I should have been signalling
you should have been signalling
he should have been signalling
we should have been signalling
you should have been signalling
they should have been signalling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not signal
you should not signal
he should not signal
we should not signal
you should not signal
they should not signal 	I should not be signalling
you should not be signalling
he should not be signalling
we should not be signalling
you should not be signalling
they should not be signalling	I should not have signalled
you should not have signalled
he should not have signalled
we should not have signalled
you should not have signalled
they should not have signalled	I should not have been signalling
you should not have been signalling
he should not have been signalling
we should not have been signalling
you should not have been signalling
they should not have been signalling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I signal?
should you signal?
should he signal?
should we signal?
should you signal?
should they signal? 	should I be signalling?
should you be signalling?
should he be signalling?
should we be signalling?
should you be signalling?
should they be signalling? 	should I have signalled?
should you have signalled?
should he have signalled?
should we have signalled?
should you have signalled?
should they have signalled? 	should I have been signalling?
should you have been signalling?
should he have been signalling?
should we have been signalling?
should you have been signalling?
should they have been signalling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not signal?
should you not signal?
should he not signal?
should we not signal?
should you not signal?
should they not signal? 	should I not be signalling?
should you not be signalling?
should he not be signalling?
should we not be signalling?
should you not be signalling?
should they not be signalling? 	should I not have signalled?
should you not have signalled?
should he not have signalled?
should we not have signalled?
should you not have signalled?
should they not have signalled? 	should I not have been signalling?
should you not have been signalling?
should he not have been signalling?
should we not have been signalling?
should you not have been signalling?
should they not have been signalling?