I must clink you must clink he must clink we must clink you must clink they must clink
V-ing form
I must be clinking you must be clinking he must be clinking we must be clinking you must be clinking they must be clinking
Perfect
I must have clinked you must have clinked he must have clinked we must have clinked you must have clinked they must have clinked
V-ing perfect
I must have been clinking you must have been clinking he must have been clinking we must have been clinking you must have been clinking they must have been clinking
Negation
Simple form
I must not clink you must not clink he must not clink we must not clink you must not clink they must not clink
V-ing form
I must not be clinking you must not be clinking he must not be clinking we must not be clinking you must not be clinking they must not be clinking
Perfect
I must not have clinked you must not have clinked he must not have clinked we must not have clinked you must not have clinked they must not have clinked
V-ing perfect
I must not have been clinking you must not have been clinking he must not have been clinking we must not have been clinking you must not have been clinking they must not have been clinking
Interrogative form
Simple form
must I clink? must you clink? must he clink? must we clink? must you clink? must they clink?
V-ing form
must I be clinking? must you be clinking? must he be clinking? must we be clinking? must you be clinking? must they be clinking?
Perfect
must I have clinked? must you have clinked? must he have clinked? must we have clinked? must you have clinked? must they have clinked?
V-ing perfect
must I have been clinking? must you have been clinking? must he have been clinking? must we have been clinking? must you have been clinking? must they have been clinking?
Interro-negative form
Simple form
must I not clink? must you not clink? must he not clink? must we not clink? must you not clink? must they not clink?
V-ing form
must I not be clinking? must you not be clinking? must he not be clinking? must we not be clinking? must you not be clinking? must they not be clinking?
Perfect
must I not have clinked? must you not have clinked? must he not have clinked? must we not have clinked? must you not have clinked? must they not have clinked?
V-ing perfect
must I not have been clinking? must you not have been clinking? must he not have been clinking? must we not have been clinking? must you not have been clinking? must they not have been clinking?