English verb conjugation
COULD CURDLE

Regular verb: curdle - curdled - curdled

Affirmation

Simple form	V-ing form
I could curdle you could curdle she could curdle we could curdle you could curdle they could curdle	I could be curdling you could be curdling she 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 she 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 she 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 could not curdle you could not curdle she could not curdle we could not curdle you could not curdle they could not curdle	I could not be curdling you could not be curdling she could not be curdling we could not be curdling you could not be curdling they could not be curdling
Perfect	V-ing perfect
I could not have curdled you could not have curdled she could not have curdled we could not have curdled you could not have curdled they could not have curdled	I could not have been curdling you could not have been curdling she could not have been curdling we could not have been curdling you could not have been curdling they could not have been curdling

Interrogative form

Simple form	V-ing form
could I curdle? could you curdle? could she curdle? could we curdle? could you curdle? could they curdle?	could I be curdling? could you be curdling? could she 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 she 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 she 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
could I not curdle? could you not curdle? could she not curdle? could we not curdle? could you not curdle? could they not curdle?	could I not be curdling? could you not be curdling? could she not be curdling? could we not be curdling? could you not be curdling? could they not be curdling?
Perfect	V-ing perfect
could I not have curdled? could you not have curdled? could she not have curdled? could we not have curdled? could you not have curdled? could they not have curdled?	could I not have been curdling? could you not have been curdling? could she not have been curdling? could we not have been curdling? could you not have been curdling? could they not have been curdling?