must close
Regular verb: close - closed- closed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must close
you must close
she must close
we must close
you must close
they must close 	I must be closing
you must be closing
she must be closing
we must be closing
you must be closing
they must be closing	I must have closed
you must have closed
she must have closed
we must have closed
you must have closed
they must have closed	I must have been closing
you must have been closing
she must have been closing
we must have been closing
you must have been closing
they must have been closing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not close
you must not close
she must not close
we must not close
you must not close
they must not close 	I must not be closing
you must not be closing
she must not be closing
we must not be closing
you must not be closing
they must not be closing	I must not have closed
you must not have closed
she must not have closed
we must not have closed
you must not have closed
they must not have closed	I must not have been closing
you must not have been closing
she must not have been closing
we must not have been closing
you must not have been closing
they must not have been closing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I close?
must you close?
must she close?
must we close?
must you close?
must they close? 	must I be closing?
must you be closing?
must she be closing?
must we be closing?
must you be closing?
must they be closing? 	must I have closed?
must you have closed?
must she have closed?
must we have closed?
must you have closed?
must they have closed? 	must I have been closing?
must you have been closing?
must she have been closing?
must we have been closing?
must you have been closing?
must they have been closing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not close?
must you not close?
must she not close?
must we not close?
must you not close?
must they not close? 	must I not be closing?
must you not be closing?
must she not be closing?
must we not be closing?
must you not be closing?
must they not be closing? 	must I not have closed?
must you not have closed?
must she not have closed?
must we not have closed?
must you not have closed?
must they not have closed? 	must I not have been closing?
must you not have been closing?
must she not have been closing?
must we not have been closing?
must you not have been closing?
must they not have been closing?