Regular verb: stamp - stamped - stamped
Simple form | V-ing form |
I must stamp you must stamp she must stamp we must stamp you must stamp they must stamp | I must be stamping you must be stamping she must be stamping we must be stamping you must be stamping they must be stamping |
Perfect | V-ing perfect |
I must have stamped you must have stamped she must have stamped we must have stamped you must have stamped they must have stamped | I must have been stamping you must have been stamping she must have been stamping we must have been stamping you must have been stamping they must have been stamping |
Simple form | V-ing form |
I must not stamp you must not stamp she must not stamp we must not stamp you must not stamp they must not stamp | I must not be stamping you must not be stamping she must not be stamping we must not be stamping you must not be stamping they must not be stamping |
Perfect | V-ing perfect |
I must not have stamped you must not have stamped she must not have stamped we must not have stamped you must not have stamped they must not have stamped | I must not have been stamping you must not have been stamping she must not have been stamping we must not have been stamping you must not have been stamping they must not have been stamping |
Simple form | V-ing form |
must I stamp? must you stamp? must she stamp? must we stamp? must you stamp? must they stamp? | must I be stamping? must you be stamping? must she be stamping? must we be stamping? must you be stamping? must they be stamping? |
Perfect | V-ing perfect |
must I have stamped? must you have stamped? must she have stamped? must we have stamped? must you have stamped? must they have stamped? | must I have been stamping? must you have been stamping? must she have been stamping? must we have been stamping? must you have been stamping? must they have been stamping? |
Simple form | V-ing form |
must I not stamp? must you not stamp? must she not stamp? must we not stamp? must you not stamp? must they not stamp? | must I not be stamping? must you not be stamping? must she not be stamping? must we not be stamping? must you not be stamping? must they not be stamping? |
Perfect | V-ing perfect |
must I not have stamped? must you not have stamped? must she not have stamped? must we not have stamped? must you not have stamped? must they not have stamped? | must I not have been stamping? must you not have been stamping? must she not have been stamping? must we not have been stamping? must you not have been stamping? must they not have been stamping? |