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 can't decrease you can't decrease he can't decrease we can't decrease you can't decrease they can't decrease	I can't be decreasing you can't be decreasing he can't be decreasing we can't be decreasing you can't be decreasing they can't be decreasing
Perfect	V-ing perfect
I can't have decreased you can't have decreased he can't have decreased we can't have decreased you can't have decreased they can't have decreased	I can't have been decreasing you can't have been decreasing he can't have been decreasing we can't have been decreasing you can't have been decreasing they can't 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't I decrease? can't you decrease? can't he decrease? can't we decrease? can't you decrease? can't they decrease?	can't I be decreasing? can't you be decreasing? can't he be decreasing? can't we be decreasing? can't you be decreasing? can't they be decreasing?
Perfect	V-ing perfect
can't I have decreased? can't you have decreased? can't he have decreased? can't we have decreased? can't you have decreased? can't they have decreased?	can't I have been decreasing? can't you have been decreasing? can't he have been decreasing? can't we have been decreasing? can't you have been decreasing? can't they have been decreasing?