English verb conjugation
CAN TOPPLE

Regular verb: topple - toppled - toppled

Affirmation

Simple form	V-ing form
I can topple you can topple he can topple we can topple you can topple they can topple	I can be toppling you can be toppling he can be toppling we can be toppling you can be toppling they can be toppling
Perfect	V-ing perfect
I can have toppled you can have toppled he can have toppled we can have toppled you can have toppled they can have toppled	I can have been toppling you can have been toppling he can have been toppling we can have been toppling you can have been toppling they can have been toppling

Negation

Simple form	V-ing form
I can't topple you can't topple he can't topple we can't topple you can't topple they can't topple	I can't be toppling you can't be toppling he can't be toppling we can't be toppling you can't be toppling they can't be toppling
Perfect	V-ing perfect
I can't have toppled you can't have toppled he can't have toppled we can't have toppled you can't have toppled they can't have toppled	I can't have been toppling you can't have been toppling he can't have been toppling we can't have been toppling you can't have been toppling they can't have been toppling

Interrogative form

Simple form	V-ing form
can I topple? can you topple? can he topple? can we topple? can you topple? can they topple?	can I be toppling? can you be toppling? can he be toppling? can we be toppling? can you be toppling? can they be toppling?
Perfect	V-ing perfect
can I have toppled? can you have toppled? can he have toppled? can we have toppled? can you have toppled? can they have toppled?	can I have been toppling? can you have been toppling? can he have been toppling? can we have been toppling? can you have been toppling? can they have been toppling?

Interro-negative form

Simple form	V-ing form
can't I topple? can't you topple? can't he topple? can't we topple? can't you topple? can't they topple?	can't I be toppling? can't you be toppling? can't he be toppling? can't we be toppling? can't you be toppling? can't they be toppling?
Perfect	V-ing perfect
can't I have toppled? can't you have toppled? can't he have toppled? can't we have toppled? can't you have toppled? can't they have toppled?	can't I have been toppling? can't you have been toppling? can't he have been toppling? can't we have been toppling? can't you have been toppling? can't they have been toppling?