could size
Regular verb: size - sized- sized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could size
you could size
she could size
we could size
you could size
they could size 	I could be sizing
you could be sizing
she could be sizing
we could be sizing
you could be sizing
they could be sizing	I could have sized
you could have sized
she could have sized
we could have sized
you could have sized
they could have sized	I could have been sizing
you could have been sizing
she could have been sizing
we could have been sizing
you could have been sizing
they could have been sizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't size
you couldn't size
she couldn't size
we couldn't size
you couldn't size
they couldn't size 	I couldn't be sizing
you couldn't be sizing
she couldn't be sizing
we couldn't be sizing
you couldn't be sizing
they couldn't be sizing	I couldn't have sized
you couldn't have sized
she couldn't have sized
we couldn't have sized
you couldn't have sized
they couldn't have sized	I couldn't have been sizing
you couldn't have been sizing
she couldn't have been sizing
we couldn't have been sizing
you couldn't have been sizing
they couldn't have been sizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I size?
could you size?
could she size?
could we size?
could you size?
could they size? 	could I be sizing?
could you be sizing?
could she be sizing?
could we be sizing?
could you be sizing?
could they be sizing? 	could I have sized?
could you have sized?
could she have sized?
could we have sized?
could you have sized?
could they have sized? 	could I have been sizing?
could you have been sizing?
could she have been sizing?
could we have been sizing?
could you have been sizing?
could they have been sizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I size?
couldn't you size?
couldn't she size?
couldn't we size?
couldn't you size?
couldn't they size? 	couldn't I be sizing?
couldn't you be sizing?
couldn't she be sizing?
couldn't we be sizing?
couldn't you be sizing?
couldn't they be sizing? 	couldn't I have sized?
couldn't you have sized?
couldn't she have sized?
couldn't we have sized?
couldn't you have sized?
couldn't they have sized? 	couldn't I have been sizing?
couldn't you have been sizing?
couldn't she have been sizing?
couldn't we have been sizing?
couldn't you have been sizing?
couldn't they have been sizing?