English verb conjugation
COULD STARTLE

Regular verb: startle - startled - startled

Affirmation

Simple form	V-ing form
I could startle you could startle she could startle we could startle you could startle they could startle	I could be startling you could be startling she could be startling we could be startling you could be startling they could be startling
Perfect	V-ing perfect
I could have startled you could have startled she could have startled we could have startled you could have startled they could have startled	I could have been startling you could have been startling she could have been startling we could have been startling you could have been startling they could have been startling

Negation

Simple form	V-ing form
I could not startle you could not startle she could not startle we could not startle you could not startle they could not startle	I could not be startling you could not be startling she could not be startling we could not be startling you could not be startling they could not be startling
Perfect	V-ing perfect
I could not have startled you could not have startled she could not have startled we could not have startled you could not have startled they could not have startled	I could not have been startling you could not have been startling she could not have been startling we could not have been startling you could not have been startling they could not have been startling

Interrogative form

Simple form	V-ing form
could I startle? could you startle? could she startle? could we startle? could you startle? could they startle?	could I be startling? could you be startling? could she be startling? could we be startling? could you be startling? could they be startling?
Perfect	V-ing perfect
could I have startled? could you have startled? could she have startled? could we have startled? could you have startled? could they have startled?	could I have been startling? could you have been startling? could she have been startling? could we have been startling? could you have been startling? could they have been startling?

Interro-negative form

Simple form	V-ing form
could I not startle? could you not startle? could she not startle? could we not startle? could you not startle? could they not startle?	could I not be startling? could you not be startling? could she not be startling? could we not be startling? could you not be startling? could they not be startling?
Perfect	V-ing perfect
could I not have startled? could you not have startled? could she not have startled? could we not have startled? could you not have startled? could they not have startled?	could I not have been startling? could you not have been startling? could she not have been startling? could we not have been startling? could you not have been startling? could they not have been startling?