must ripple
Regular verb: ripple - rippled- rippled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must ripple
you must ripple
she must ripple
we must ripple
you must ripple
they must ripple 	I must be rippling
you must be rippling
she must be rippling
we must be rippling
you must be rippling
they must be rippling	I must have rippled
you must have rippled
she must have rippled
we must have rippled
you must have rippled
they must have rippled	I must have been rippling
you must have been rippling
she must have been rippling
we must have been rippling
you must have been rippling
they must have been rippling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't ripple
you mustn't ripple
she mustn't ripple
we mustn't ripple
you mustn't ripple
they mustn't ripple 	I mustn't be rippling
you mustn't be rippling
she mustn't be rippling
we mustn't be rippling
you mustn't be rippling
they mustn't be rippling	I mustn't have rippled
you mustn't have rippled
she mustn't have rippled
we mustn't have rippled
you mustn't have rippled
they mustn't have rippled	I mustn't have been rippling
you mustn't have been rippling
she mustn't have been rippling
we mustn't have been rippling
you mustn't have been rippling
they mustn't have been rippling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I ripple?
must you ripple?
must she ripple?
must we ripple?
must you ripple?
must they ripple? 	must I be rippling?
must you be rippling?
must she be rippling?
must we be rippling?
must you be rippling?
must they be rippling? 	must I have rippled?
must you have rippled?
must she have rippled?
must we have rippled?
must you have rippled?
must they have rippled? 	must I have been rippling?
must you have been rippling?
must she have been rippling?
must we have been rippling?
must you have been rippling?
must they have been rippling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I ripple?
mustn't you ripple?
mustn't she ripple?
mustn't we ripple?
mustn't you ripple?
mustn't they ripple? 	mustn't I be rippling?
mustn't you be rippling?
mustn't she be rippling?
mustn't we be rippling?
mustn't you be rippling?
mustn't they be rippling? 	mustn't I have rippled?
mustn't you have rippled?
mustn't she have rippled?
mustn't we have rippled?
mustn't you have rippled?
mustn't they have rippled? 	mustn't I have been rippling?
mustn't you have been rippling?
mustn't she have been rippling?
mustn't we have been rippling?
mustn't you have been rippling?
mustn't they have been rippling?