English verb conjugation
COULD TRIPLE

Regular verb: triple - tripled - tripled

Affirmation

Simple form	V-ing form
I could triple you could triple he could triple we could triple you could triple they could triple	I could be tripling you could be tripling he could be tripling we could be tripling you could be tripling they could be tripling
Perfect	V-ing perfect
I could have tripled you could have tripled he could have tripled we could have tripled you could have tripled they could have tripled	I could have been tripling you could have been tripling he could have been tripling we could have been tripling you could have been tripling they could have been tripling

Negation

Simple form	V-ing form
I couldn't triple you couldn't triple he couldn't triple we couldn't triple you couldn't triple they couldn't triple	I couldn't be tripling you couldn't be tripling he couldn't be tripling we couldn't be tripling you couldn't be tripling they couldn't be tripling
Perfect	V-ing perfect
I couldn't have tripled you couldn't have tripled he couldn't have tripled we couldn't have tripled you couldn't have tripled they couldn't have tripled	I couldn't have been tripling you couldn't have been tripling he couldn't have been tripling we couldn't have been tripling you couldn't have been tripling they couldn't have been tripling

Interrogative form

Simple form	V-ing form
could I triple? could you triple? could he triple? could we triple? could you triple? could they triple?	could I be tripling? could you be tripling? could he be tripling? could we be tripling? could you be tripling? could they be tripling?
Perfect	V-ing perfect
could I have tripled? could you have tripled? could he have tripled? could we have tripled? could you have tripled? could they have tripled?	could I have been tripling? could you have been tripling? could he have been tripling? could we have been tripling? could you have been tripling? could they have been tripling?

Interro-negative form

Simple form	V-ing form
couldn't I triple? couldn't you triple? couldn't he triple? couldn't we triple? couldn't you triple? couldn't they triple?	couldn't I be tripling? couldn't you be tripling? couldn't he be tripling? couldn't we be tripling? couldn't you be tripling? couldn't they be tripling?
Perfect	V-ing perfect
couldn't I have tripled? couldn't you have tripled? couldn't he have tripled? couldn't we have tripled? couldn't you have tripled? couldn't they have tripled?	couldn't I have been tripling? couldn't you have been tripling? couldn't he have been tripling? couldn't we have been tripling? couldn't you have been tripling? couldn't they have been tripling?