could quantitate
Regular verb: quantitate - quantitated- quantitated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could quantitate
you could quantitate
she could quantitate
we could quantitate
you could quantitate
they could quantitate 	I could be quantitating
you could be quantitating
she could be quantitating
we could be quantitating
you could be quantitating
they could be quantitating	I could have quantitated
you could have quantitated
she could have quantitated
we could have quantitated
you could have quantitated
they could have quantitated	I could have been quantitating
you could have been quantitating
she could have been quantitating
we could have been quantitating
you could have been quantitating
they could have been quantitating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't quantitate
you couldn't quantitate
she couldn't quantitate
we couldn't quantitate
you couldn't quantitate
they couldn't quantitate 	I couldn't be quantitating
you couldn't be quantitating
she couldn't be quantitating
we couldn't be quantitating
you couldn't be quantitating
they couldn't be quantitating	I couldn't have quantitated
you couldn't have quantitated
she couldn't have quantitated
we couldn't have quantitated
you couldn't have quantitated
they couldn't have quantitated	I couldn't have been quantitating
you couldn't have been quantitating
she couldn't have been quantitating
we couldn't have been quantitating
you couldn't have been quantitating
they couldn't have been quantitating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I quantitate?
could you quantitate?
could she quantitate?
could we quantitate?
could you quantitate?
could they quantitate? 	could I be quantitating?
could you be quantitating?
could she be quantitating?
could we be quantitating?
could you be quantitating?
could they be quantitating? 	could I have quantitated?
could you have quantitated?
could she have quantitated?
could we have quantitated?
could you have quantitated?
could they have quantitated? 	could I have been quantitating?
could you have been quantitating?
could she have been quantitating?
could we have been quantitating?
could you have been quantitating?
could they have been quantitating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I quantitate?
couldn't you quantitate?
couldn't she quantitate?
couldn't we quantitate?
couldn't you quantitate?
couldn't they quantitate? 	couldn't I be quantitating?
couldn't you be quantitating?
couldn't she be quantitating?
couldn't we be quantitating?
couldn't you be quantitating?
couldn't they be quantitating? 	couldn't I have quantitated?
couldn't you have quantitated?
couldn't she have quantitated?
couldn't we have quantitated?
couldn't you have quantitated?
couldn't they have quantitated? 	couldn't I have been quantitating?
couldn't you have been quantitating?
couldn't she have been quantitating?
couldn't we have been quantitating?
couldn't you have been quantitating?
couldn't they have been quantitating?