English verb conjugation
COULD CURDLE

Regular verb: curdle - curdled - curdled

Affirmation

Simple form	V-ing form
I could curdle you could curdle he could curdle we could curdle you could curdle they could curdle	I could be curdling you could be curdling he could be curdling we could be curdling you could be curdling they could be curdling
Perfect	V-ing perfect
I could have curdled you could have curdled he could have curdled we could have curdled you could have curdled they could have curdled	I could have been curdling you could have been curdling he could have been curdling we could have been curdling you could have been curdling they could have been curdling

Negation

Simple form	V-ing form
I couldn't curdle you couldn't curdle he couldn't curdle we couldn't curdle you couldn't curdle they couldn't curdle	I couldn't be curdling you couldn't be curdling he couldn't be curdling we couldn't be curdling you couldn't be curdling they couldn't be curdling
Perfect	V-ing perfect
I couldn't have curdled you couldn't have curdled he couldn't have curdled we couldn't have curdled you couldn't have curdled they couldn't have curdled	I couldn't have been curdling you couldn't have been curdling he couldn't have been curdling we couldn't have been curdling you couldn't have been curdling they couldn't have been curdling

Interrogative form

Simple form	V-ing form
could I curdle? could you curdle? could he curdle? could we curdle? could you curdle? could they curdle?	could I be curdling? could you be curdling? could he be curdling? could we be curdling? could you be curdling? could they be curdling?
Perfect	V-ing perfect
could I have curdled? could you have curdled? could he have curdled? could we have curdled? could you have curdled? could they have curdled?	could I have been curdling? could you have been curdling? could he have been curdling? could we have been curdling? could you have been curdling? could they have been curdling?

Interro-negative form

Simple form	V-ing form
couldn't I curdle? couldn't you curdle? couldn't he curdle? couldn't we curdle? couldn't you curdle? couldn't they curdle?	couldn't I be curdling? couldn't you be curdling? couldn't he be curdling? couldn't we be curdling? couldn't you be curdling? couldn't they be curdling?
Perfect	V-ing perfect
couldn't I have curdled? couldn't you have curdled? couldn't he have curdled? couldn't we have curdled? couldn't you have curdled? couldn't they have curdled?	couldn't I have been curdling? couldn't you have been curdling? couldn't he have been curdling? couldn't we have been curdling? couldn't you have been curdling? couldn't they have been curdling?