I can oppose you can oppose he can oppose we can oppose you can oppose they can oppose
V-ing form
I can be opposing you can be opposing he can be opposing we can be opposing you can be opposing they can be opposing
Perfect
I can have opposed you can have opposed he can have opposed we can have opposed you can have opposed they can have opposed
V-ing perfect
I can have been opposing you can have been opposing he can have been opposing we can have been opposing you can have been opposing they can have been opposing
Negation
Simple form
I cannot oppose you cannot oppose he cannot oppose we cannot oppose you cannot oppose they cannot oppose
V-ing form
I cannot be opposing you cannot be opposing he cannot be opposing we cannot be opposing you cannot be opposing they cannot be opposing
Perfect
I cannot have opposed you cannot have opposed he cannot have opposed we cannot have opposed you cannot have opposed they cannot have opposed
V-ing perfect
I cannot have been opposing you cannot have been opposing he cannot have been opposing we cannot have been opposing you cannot have been opposing they cannot have been opposing
Interrogative form
Simple form
can I oppose? can you oppose? can he oppose? can we oppose? can you oppose? can they oppose?
V-ing form
can I be opposing? can you be opposing? can he be opposing? can we be opposing? can you be opposing? can they be opposing?
Perfect
can I have opposed? can you have opposed? can he have opposed? can we have opposed? can you have opposed? can they have opposed?
V-ing perfect
can I have been opposing? can you have been opposing? can he have been opposing? can we have been opposing? can you have been opposing? can they have been opposing?
Interro-negative form
Simple form
can I not oppose? can you not oppose? can he not oppose? can we not oppose? can you not oppose? can they not oppose?
V-ing form
can I not be opposing? can you not be opposing? can he not be opposing? can we not be opposing? can you not be opposing? can they not be opposing?
Perfect
can I not have opposed? can you not have opposed? can he not have opposed? can we not have opposed? can you not have opposed? can they not have opposed?
V-ing perfect
can I not have been opposing? can you not have been opposing? can he not have been opposing? can we not have been opposing? can you not have been opposing? can they not have been opposing?