must trickle
Regular verb: trickle - trickled- trickled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must trickle
you must trickle
he must trickle
we must trickle
you must trickle
they must trickle 	I must be trickling
you must be trickling
he must be trickling
we must be trickling
you must be trickling
they must be trickling	I must have trickled
you must have trickled
he must have trickled
we must have trickled
you must have trickled
they must have trickled	I must have been trickling
you must have been trickling
he must have been trickling
we must have been trickling
you must have been trickling
they must have been trickling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't trickle
you mustn't trickle
he mustn't trickle
we mustn't trickle
you mustn't trickle
they mustn't trickle 	I mustn't be trickling
you mustn't be trickling
he mustn't be trickling
we mustn't be trickling
you mustn't be trickling
they mustn't be trickling	I mustn't have trickled
you mustn't have trickled
he mustn't have trickled
we mustn't have trickled
you mustn't have trickled
they mustn't have trickled	I mustn't have been trickling
you mustn't have been trickling
he mustn't have been trickling
we mustn't have been trickling
you mustn't have been trickling
they mustn't have been trickling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I trickle?
must you trickle?
must he trickle?
must we trickle?
must you trickle?
must they trickle? 	must I be trickling?
must you be trickling?
must he be trickling?
must we be trickling?
must you be trickling?
must they be trickling? 	must I have trickled?
must you have trickled?
must he have trickled?
must we have trickled?
must you have trickled?
must they have trickled? 	must I have been trickling?
must you have been trickling?
must he have been trickling?
must we have been trickling?
must you have been trickling?
must they have been trickling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I trickle?
mustn't you trickle?
mustn't he trickle?
mustn't we trickle?
mustn't you trickle?
mustn't they trickle? 	mustn't I be trickling?
mustn't you be trickling?
mustn't he be trickling?
mustn't we be trickling?
mustn't you be trickling?
mustn't they be trickling? 	mustn't I have trickled?
mustn't you have trickled?
mustn't he have trickled?
mustn't we have trickled?
mustn't you have trickled?
mustn't they have trickled? 	mustn't I have been trickling?
mustn't you have been trickling?
mustn't he have been trickling?
mustn't we have been trickling?
mustn't you have been trickling?
mustn't they have been trickling?