English verb conjugation
CAN DECREASE

Regular verb: decrease - decreased - decreased

Affirmation

Simple form	V-ing form
I can decrease you can decrease he can decrease we can decrease you can decrease they can decrease	I can be decreasing you can be decreasing he can be decreasing we can be decreasing you can be decreasing they can be decreasing
Perfect	V-ing perfect
I can have decreased you can have decreased he can have decreased we can have decreased you can have decreased they can have decreased	I can have been decreasing you can have been decreasing he can have been decreasing we can have been decreasing you can have been decreasing they can have been decreasing

Negation

Simple form	V-ing form
I cannot decrease you cannot decrease he cannot decrease we cannot decrease you cannot decrease they cannot decrease	I cannot be decreasing you cannot be decreasing he cannot be decreasing we cannot be decreasing you cannot be decreasing they cannot be decreasing
Perfect	V-ing perfect
I cannot have decreased you cannot have decreased he cannot have decreased we cannot have decreased you cannot have decreased they cannot have decreased	I cannot have been decreasing you cannot have been decreasing he cannot have been decreasing we cannot have been decreasing you cannot have been decreasing they cannot have been decreasing

Interrogative form

Simple form	V-ing form
can I decrease? can you decrease? can he decrease? can we decrease? can you decrease? can they decrease?	can I be decreasing? can you be decreasing? can he be decreasing? can we be decreasing? can you be decreasing? can they be decreasing?
Perfect	V-ing perfect
can I have decreased? can you have decreased? can he have decreased? can we have decreased? can you have decreased? can they have decreased?	can I have been decreasing? can you have been decreasing? can he have been decreasing? can we have been decreasing? can you have been decreasing? can they have been decreasing?

Interro-negative form

Simple form	V-ing form
can I not decrease? can you not decrease? can he not decrease? can we not decrease? can you not decrease? can they not decrease?	can I not be decreasing? can you not be decreasing? can he not be decreasing? can we not be decreasing? can you not be decreasing? can they not be decreasing?
Perfect	V-ing perfect
can I not have decreased? can you not have decreased? can he not have decreased? can we not have decreased? can you not have decreased? can they not have decreased?	can I not have been decreasing? can you not have been decreasing? can he not have been decreasing? can we not have been decreasing? can you not have been decreasing? can they not have been decreasing?