English verb conjugation
CAN TILL

Regular verb: till - tilled - tilled

Affirmation

Simple form	V-ing form
I can till you can till she can till we can till you can till they can till	I can be tilling you can be tilling she can be tilling we can be tilling you can be tilling they can be tilling
Perfect	V-ing perfect
I can have tilled you can have tilled she can have tilled we can have tilled you can have tilled they can have tilled	I can have been tilling you can have been tilling she can have been tilling we can have been tilling you can have been tilling they can have been tilling

Negation

Simple form	V-ing form
I cannot till you cannot till she cannot till we cannot till you cannot till they cannot till	I cannot be tilling you cannot be tilling she cannot be tilling we cannot be tilling you cannot be tilling they cannot be tilling
Perfect	V-ing perfect
I cannot have tilled you cannot have tilled she cannot have tilled we cannot have tilled you cannot have tilled they cannot have tilled	I cannot have been tilling you cannot have been tilling she cannot have been tilling we cannot have been tilling you cannot have been tilling they cannot have been tilling

Interrogative form

Simple form	V-ing form
can I till? can you till? can she till? can we till? can you till? can they till?	can I be tilling? can you be tilling? can she be tilling? can we be tilling? can you be tilling? can they be tilling?
Perfect	V-ing perfect
can I have tilled? can you have tilled? can she have tilled? can we have tilled? can you have tilled? can they have tilled?	can I have been tilling? can you have been tilling? can she have been tilling? can we have been tilling? can you have been tilling? can they have been tilling?

Interro-negative form

Simple form	V-ing form
can I not till? can you not till? can she not till? can we not till? can you not till? can they not till?	can I not be tilling? can you not be tilling? can she not be tilling? can we not be tilling? can you not be tilling? can they not be tilling?
Perfect	V-ing perfect
can I not have tilled? can you not have tilled? can she not have tilled? can we not have tilled? can you not have tilled? can they not have tilled?	can I not have been tilling? can you not have been tilling? can she not have been tilling? can we not have been tilling? can you not have been tilling? can they not have been tilling?