English verb conjugation
CAN TILL

Regular verb: till - tilled - tilled

Affirmation

Simple form	V-ing form
I can till you can till he can till we can till you can till they can till	I can be tilling you can be tilling he 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 he 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 he 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 he cannot till we cannot till you cannot till they cannot till	I cannot be tilling you cannot be tilling he 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 he 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 he 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 he till? can we till? can you till? can they till?	can I be tilling? can you be tilling? can he 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 he 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 he 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 he 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 he 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 he 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 he not have been tilling? can we not have been tilling? can you not have been tilling? can they not have been tilling?