could suckle
Regular verb: suckle - suckled- suckled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could suckle
you could suckle
she could suckle
we could suckle
you could suckle
they could suckle 	I could be suckling
you could be suckling
she could be suckling
we could be suckling
you could be suckling
they could be suckling	I could have suckled
you could have suckled
she could have suckled
we could have suckled
you could have suckled
they could have suckled	I could have been suckling
you could have been suckling
she could have been suckling
we could have been suckling
you could have been suckling
they could have been suckling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not suckle
you could not suckle
she could not suckle
we could not suckle
you could not suckle
they could not suckle 	I could not be suckling
you could not be suckling
she could not be suckling
we could not be suckling
you could not be suckling
they could not be suckling	I could not have suckled
you could not have suckled
she could not have suckled
we could not have suckled
you could not have suckled
they could not have suckled	I could not have been suckling
you could not have been suckling
she could not have been suckling
we could not have been suckling
you could not have been suckling
they could not have been suckling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I suckle?
could you suckle?
could she suckle?
could we suckle?
could you suckle?
could they suckle? 	could I be suckling?
could you be suckling?
could she be suckling?
could we be suckling?
could you be suckling?
could they be suckling? 	could I have suckled?
could you have suckled?
could she have suckled?
could we have suckled?
could you have suckled?
could they have suckled? 	could I have been suckling?
could you have been suckling?
could she have been suckling?
could we have been suckling?
could you have been suckling?
could they have been suckling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not suckle?
could you not suckle?
could she not suckle?
could we not suckle?
could you not suckle?
could they not suckle? 	could I not be suckling?
could you not be suckling?
could she not be suckling?
could we not be suckling?
could you not be suckling?
could they not be suckling? 	could I not have suckled?
could you not have suckled?
could she not have suckled?
could we not have suckled?
could you not have suckled?
could they not have suckled? 	could I not have been suckling?
could you not have been suckling?
could she not have been suckling?
could we not have been suckling?
could you not have been suckling?
could they not have been suckling?