I can quantify you can quantify he can quantify we can quantify you can quantify they can quantify
V-ing form
I can be quantifying you can be quantifying he can be quantifying we can be quantifying you can be quantifying they can be quantifying
Perfect
I can have quantified you can have quantified he can have quantified we can have quantified you can have quantified they can have quantified
V-ing perfect
I can have been quantifying you can have been quantifying he can have been quantifying we can have been quantifying you can have been quantifying they can have been quantifying
Negation
Simple form
I cannot quantify you cannot quantify he cannot quantify we cannot quantify you cannot quantify they cannot quantify
V-ing form
I cannot be quantifying you cannot be quantifying he cannot be quantifying we cannot be quantifying you cannot be quantifying they cannot be quantifying
Perfect
I cannot have quantified you cannot have quantified he cannot have quantified we cannot have quantified you cannot have quantified they cannot have quantified
V-ing perfect
I cannot have been quantifying you cannot have been quantifying he cannot have been quantifying we cannot have been quantifying you cannot have been quantifying they cannot have been quantifying
Interrogative form
Simple form
can I quantify? can you quantify? can he quantify? can we quantify? can you quantify? can they quantify?
V-ing form
can I be quantifying? can you be quantifying? can he be quantifying? can we be quantifying? can you be quantifying? can they be quantifying?
Perfect
can I have quantified? can you have quantified? can he have quantified? can we have quantified? can you have quantified? can they have quantified?
V-ing perfect
can I have been quantifying? can you have been quantifying? can he have been quantifying? can we have been quantifying? can you have been quantifying? can they have been quantifying?
Interro-negative form
Simple form
can I not quantify? can you not quantify? can he not quantify? can we not quantify? can you not quantify? can they not quantify?
V-ing form
can I not be quantifying? can you not be quantifying? can he not be quantifying? can we not be quantifying? can you not be quantifying? can they not be quantifying?
Perfect
can I not have quantified? can you not have quantified? can he not have quantified? can we not have quantified? can you not have quantified? can they not have quantified?
V-ing perfect
can I not have been quantifying? can you not have been quantifying? can he not have been quantifying? can we not have been quantifying? can you not have been quantifying? can they not have been quantifying?