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 couldn't suckle
you couldn't suckle
she couldn't suckle
we couldn't suckle
you couldn't suckle
they couldn't suckle 	I couldn't be suckling
you couldn't be suckling
she couldn't be suckling
we couldn't be suckling
you couldn't be suckling
they couldn't be suckling	I couldn't have suckled
you couldn't have suckled
she couldn't have suckled
we couldn't have suckled
you couldn't have suckled
they couldn't have suckled	I couldn't have been suckling
you couldn't have been suckling
she couldn't have been suckling
we couldn't have been suckling
you couldn't have been suckling
they couldn't 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 	
couldn't I suckle?
couldn't you suckle?
couldn't she suckle?
couldn't we suckle?
couldn't you suckle?
couldn't they suckle? 	couldn't I be suckling?
couldn't you be suckling?
couldn't she be suckling?
couldn't we be suckling?
couldn't you be suckling?
couldn't they be suckling? 	couldn't I have suckled?
couldn't you have suckled?
couldn't she have suckled?
couldn't we have suckled?
couldn't you have suckled?
couldn't they have suckled? 	couldn't I have been suckling?
couldn't you have been suckling?
couldn't she have been suckling?
couldn't we have been suckling?
couldn't you have been suckling?
couldn't they have been suckling?