English verb conjugation
COULD DATESTAMP

Regular verb: datestamp - datestamped - datestamped

Affirmation

Simple form	V-ing form
I could datestamp you could datestamp she could datestamp we could datestamp you could datestamp they could datestamp	I could be datestamping you could be datestamping she could be datestamping we could be datestamping you could be datestamping they could be datestamping
Perfect	V-ing perfect
I could have datestamped you could have datestamped she could have datestamped we could have datestamped you could have datestamped they could have datestamped	I could have been datestamping you could have been datestamping she could have been datestamping we could have been datestamping you could have been datestamping they could have been datestamping

Negation

Simple form	V-ing form
I couldn't datestamp you couldn't datestamp she couldn't datestamp we couldn't datestamp you couldn't datestamp they couldn't datestamp	I couldn't be datestamping you couldn't be datestamping she couldn't be datestamping we couldn't be datestamping you couldn't be datestamping they couldn't be datestamping
Perfect	V-ing perfect
I couldn't have datestamped you couldn't have datestamped she couldn't have datestamped we couldn't have datestamped you couldn't have datestamped they couldn't have datestamped	I couldn't have been datestamping you couldn't have been datestamping she couldn't have been datestamping we couldn't have been datestamping you couldn't have been datestamping they couldn't have been datestamping

Interrogative form

Simple form	V-ing form
could I datestamp? could you datestamp? could she datestamp? could we datestamp? could you datestamp? could they datestamp?	could I be datestamping? could you be datestamping? could she be datestamping? could we be datestamping? could you be datestamping? could they be datestamping?
Perfect	V-ing perfect
could I have datestamped? could you have datestamped? could she have datestamped? could we have datestamped? could you have datestamped? could they have datestamped?	could I have been datestamping? could you have been datestamping? could she have been datestamping? could we have been datestamping? could you have been datestamping? could they have been datestamping?

Interro-negative form

Simple form	V-ing form
couldn't I datestamp? couldn't you datestamp? couldn't she datestamp? couldn't we datestamp? couldn't you datestamp? couldn't they datestamp?	couldn't I be datestamping? couldn't you be datestamping? couldn't she be datestamping? couldn't we be datestamping? couldn't you be datestamping? couldn't they be datestamping?
Perfect	V-ing perfect
couldn't I have datestamped? couldn't you have datestamped? couldn't she have datestamped? couldn't we have datestamped? couldn't you have datestamped? couldn't they have datestamped?	couldn't I have been datestamping? couldn't you have been datestamping? couldn't she have been datestamping? couldn't we have been datestamping? couldn't you have been datestamping? couldn't they have been datestamping?