I can triple you can triple he can triple we can triple you can triple they can triple
V-ing form
I can be tripling you can be tripling he can be tripling we can be tripling you can be tripling they can be tripling
Perfect
I can have tripled you can have tripled he can have tripled we can have tripled you can have tripled they can have tripled
V-ing perfect
I can have been tripling you can have been tripling he can have been tripling we can have been tripling you can have been tripling they can have been tripling
Negation
Simple form
I cannot triple you cannot triple he cannot triple we cannot triple you cannot triple they cannot triple
V-ing form
I cannot be tripling you cannot be tripling he cannot be tripling we cannot be tripling you cannot be tripling they cannot be tripling
Perfect
I cannot have tripled you cannot have tripled he cannot have tripled we cannot have tripled you cannot have tripled they cannot have tripled
V-ing perfect
I cannot have been tripling you cannot have been tripling he cannot have been tripling we cannot have been tripling you cannot have been tripling they cannot have been tripling
Interrogative form
Simple form
can I triple? can you triple? can he triple? can we triple? can you triple? can they triple?
V-ing form
can I be tripling? can you be tripling? can he be tripling? can we be tripling? can you be tripling? can they be tripling?
Perfect
can I have tripled? can you have tripled? can he have tripled? can we have tripled? can you have tripled? can they have tripled?
V-ing perfect
can I have been tripling? can you have been tripling? can he have been tripling? can we have been tripling? can you have been tripling? can they have been tripling?
Interro-negative form
Simple form
can I not triple? can you not triple? can he not triple? can we not triple? can you not triple? can they not triple?
V-ing form
can I not be tripling? can you not be tripling? can he not be tripling? can we not be tripling? can you not be tripling? can they not be tripling?
Perfect
can I not have tripled? can you not have tripled? can he not have tripled? can we not have tripled? can you not have tripled? can they not have tripled?
V-ing perfect
can I not have been tripling? can you not have been tripling? can he not have been tripling? can we not have been tripling? can you not have been tripling? can they not have been tripling?