I can accumulate you can accumulate she can accumulate we can accumulate you can accumulate they can accumulate
V-ing form
I can be accumulating you can be accumulating she can be accumulating we can be accumulating you can be accumulating they can be accumulating
Perfect
I can have accumulated you can have accumulated she can have accumulated we can have accumulated you can have accumulated they can have accumulated
V-ing perfect
I can have been accumulating you can have been accumulating she can have been accumulating we can have been accumulating you can have been accumulating they can have been accumulating
Negation
Simple form
I can't accumulate you can't accumulate she can't accumulate we can't accumulate you can't accumulate they can't accumulate
V-ing form
I can't be accumulating you can't be accumulating she can't be accumulating we can't be accumulating you can't be accumulating they can't be accumulating
Perfect
I can't have accumulated you can't have accumulated she can't have accumulated we can't have accumulated you can't have accumulated they can't have accumulated
V-ing perfect
I can't have been accumulating you can't have been accumulating she can't have been accumulating we can't have been accumulating you can't have been accumulating they can't have been accumulating
Interrogative form
Simple form
can I accumulate? can you accumulate? can she accumulate? can we accumulate? can you accumulate? can they accumulate?
V-ing form
can I be accumulating? can you be accumulating? can she be accumulating? can we be accumulating? can you be accumulating? can they be accumulating?
Perfect
can I have accumulated? can you have accumulated? can she have accumulated? can we have accumulated? can you have accumulated? can they have accumulated?
V-ing perfect
can I have been accumulating? can you have been accumulating? can she have been accumulating? can we have been accumulating? can you have been accumulating? can they have been accumulating?
Interro-negative form
Simple form
can't I accumulate? can't you accumulate? can't she accumulate? can't we accumulate? can't you accumulate? can't they accumulate?
V-ing form
can't I be accumulating? can't you be accumulating? can't she be accumulating? can't we be accumulating? can't you be accumulating? can't they be accumulating?
Perfect
can't I have accumulated? can't you have accumulated? can't she have accumulated? can't we have accumulated? can't you have accumulated? can't they have accumulated?
V-ing perfect
can't I have been accumulating? can't you have been accumulating? can't she have been accumulating? can't we have been accumulating? can't you have been accumulating? can't they have been accumulating?