can yip
Regular verb: yip - yipped- yipped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can yip
you can yip
she can yip
we can yip
you can yip
they can yip 	I can be yipping
you can be yipping
she can be yipping
we can be yipping
you can be yipping
they can be yipping	I can have yipped
you can have yipped
she can have yipped
we can have yipped
you can have yipped
they can have yipped	I can have been yipping
you can have been yipping
she can have been yipping
we can have been yipping
you can have been yipping
they can have been yipping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't yip
you can't yip
she can't yip
we can't yip
you can't yip
they can't yip 	I can't be yipping
you can't be yipping
she can't be yipping
we can't be yipping
you can't be yipping
they can't be yipping	I can't have yipped
you can't have yipped
she can't have yipped
we can't have yipped
you can't have yipped
they can't have yipped	I can't have been yipping
you can't have been yipping
she can't have been yipping
we can't have been yipping
you can't have been yipping
they can't have been yipping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I yip?
can you yip?
can she yip?
can we yip?
can you yip?
can they yip? 	can I be yipping?
can you be yipping?
can she be yipping?
can we be yipping?
can you be yipping?
can they be yipping? 	can I have yipped?
can you have yipped?
can she have yipped?
can we have yipped?
can you have yipped?
can they have yipped? 	can I have been yipping?
can you have been yipping?
can she have been yipping?
can we have been yipping?
can you have been yipping?
can they have been yipping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I yip?
can't you yip?
can't she yip?
can't we yip?
can't you yip?
can't they yip? 	can't I be yipping?
can't you be yipping?
can't she be yipping?
can't we be yipping?
can't you be yipping?
can't they be yipping? 	can't I have yipped?
can't you have yipped?
can't she have yipped?
can't we have yipped?
can't you have yipped?
can't they have yipped? 	can't I have been yipping?
can't you have been yipping?
can't she have been yipping?
can't we have been yipping?
can't you have been yipping?
can't they have been yipping?