English verb conjugation
COULD TILL

Regular verb: till - tilled - tilled

Affirmation

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

Negation

Simple form	V-ing form
I couldn't till you couldn't till he couldn't till we couldn't till you couldn't till they couldn't till	I couldn't be tilling you couldn't be tilling he couldn't be tilling we couldn't be tilling you couldn't be tilling they couldn't be tilling
Perfect	V-ing perfect
I couldn't have tilled you couldn't have tilled he couldn't have tilled we couldn't have tilled you couldn't have tilled they couldn't have tilled	I couldn't have been tilling you couldn't have been tilling he couldn't have been tilling we couldn't have been tilling you couldn't have been tilling they couldn't have been tilling

Interrogative form

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

Interro-negative form

Simple form	V-ing form
couldn't I till? couldn't you till? couldn't he till? couldn't we till? couldn't you till? couldn't they till?	couldn't I be tilling? couldn't you be tilling? couldn't he be tilling? couldn't we be tilling? couldn't you be tilling? couldn't they be tilling?
Perfect	V-ing perfect
couldn't I have tilled? couldn't you have tilled? couldn't he have tilled? couldn't we have tilled? couldn't you have tilled? couldn't they have tilled?	couldn't I have been tilling? couldn't you have been tilling? couldn't he have been tilling? couldn't we have been tilling? couldn't you have been tilling? couldn't they have been tilling?