English verb conjugation
COULD RUBBERSTAMP

Regular verb: rubberstamp - rubberstamped - rubberstamped

Affirmation

Simple form	V-ing form
I could rubberstamp you could rubberstamp he could rubberstamp we could rubberstamp you could rubberstamp they could rubberstamp	I could be rubberstamping you could be rubberstamping he could be rubberstamping we could be rubberstamping you could be rubberstamping they could be rubberstamping
Perfect	V-ing perfect
I could have rubberstamped you could have rubberstamped he could have rubberstamped we could have rubberstamped you could have rubberstamped they could have rubberstamped	I could have been rubberstamping you could have been rubberstamping he could have been rubberstamping we could have been rubberstamping you could have been rubberstamping they could have been rubberstamping

Negation

Simple form	V-ing form
I couldn't rubberstamp you couldn't rubberstamp he couldn't rubberstamp we couldn't rubberstamp you couldn't rubberstamp they couldn't rubberstamp	I couldn't be rubberstamping you couldn't be rubberstamping he couldn't be rubberstamping we couldn't be rubberstamping you couldn't be rubberstamping they couldn't be rubberstamping
Perfect	V-ing perfect
I couldn't have rubberstamped you couldn't have rubberstamped he couldn't have rubberstamped we couldn't have rubberstamped you couldn't have rubberstamped they couldn't have rubberstamped	I couldn't have been rubberstamping you couldn't have been rubberstamping he couldn't have been rubberstamping we couldn't have been rubberstamping you couldn't have been rubberstamping they couldn't have been rubberstamping

Interrogative form

Simple form	V-ing form
could I rubberstamp? could you rubberstamp? could he rubberstamp? could we rubberstamp? could you rubberstamp? could they rubberstamp?	could I be rubberstamping? could you be rubberstamping? could he be rubberstamping? could we be rubberstamping? could you be rubberstamping? could they be rubberstamping?
Perfect	V-ing perfect
could I have rubberstamped? could you have rubberstamped? could he have rubberstamped? could we have rubberstamped? could you have rubberstamped? could they have rubberstamped?	could I have been rubberstamping? could you have been rubberstamping? could he have been rubberstamping? could we have been rubberstamping? could you have been rubberstamping? could they have been rubberstamping?

Interro-negative form

Simple form	V-ing form
couldn't I rubberstamp? couldn't you rubberstamp? couldn't he rubberstamp? couldn't we rubberstamp? couldn't you rubberstamp? couldn't they rubberstamp?	couldn't I be rubberstamping? couldn't you be rubberstamping? couldn't he be rubberstamping? couldn't we be rubberstamping? couldn't you be rubberstamping? couldn't they be rubberstamping?
Perfect	V-ing perfect
couldn't I have rubberstamped? couldn't you have rubberstamped? couldn't he have rubberstamped? couldn't we have rubberstamped? couldn't you have rubberstamped? couldn't they have rubberstamped?	couldn't I have been rubberstamping? couldn't you have been rubberstamping? couldn't he have been rubberstamping? couldn't we have been rubberstamping? couldn't you have been rubberstamping? couldn't they have been rubberstamping?