must tackle
Regular verb: tackle - tackled- tackled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must tackle
you must tackle
he must tackle
we must tackle
you must tackle
they must tackle 	I must be tackling
you must be tackling
he must be tackling
we must be tackling
you must be tackling
they must be tackling	I must have tackled
you must have tackled
he must have tackled
we must have tackled
you must have tackled
they must have tackled	I must have been tackling
you must have been tackling
he must have been tackling
we must have been tackling
you must have been tackling
they must have been tackling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not tackle
you must not tackle
he must not tackle
we must not tackle
you must not tackle
they must not tackle 	I must not be tackling
you must not be tackling
he must not be tackling
we must not be tackling
you must not be tackling
they must not be tackling	I must not have tackled
you must not have tackled
he must not have tackled
we must not have tackled
you must not have tackled
they must not have tackled	I must not have been tackling
you must not have been tackling
he must not have been tackling
we must not have been tackling
you must not have been tackling
they must not have been tackling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I tackle?
must you tackle?
must he tackle?
must we tackle?
must you tackle?
must they tackle? 	must I be tackling?
must you be tackling?
must he be tackling?
must we be tackling?
must you be tackling?
must they be tackling? 	must I have tackled?
must you have tackled?
must he have tackled?
must we have tackled?
must you have tackled?
must they have tackled? 	must I have been tackling?
must you have been tackling?
must he have been tackling?
must we have been tackling?
must you have been tackling?
must they have been tackling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not tackle?
must you not tackle?
must he not tackle?
must we not tackle?
must you not tackle?
must they not tackle? 	must I not be tackling?
must you not be tackling?
must he not be tackling?
must we not be tackling?
must you not be tackling?
must they not be tackling? 	must I not have tackled?
must you not have tackled?
must he not have tackled?
must we not have tackled?
must you not have tackled?
must they not have tackled? 	must I not have been tackling?
must you not have been tackling?
must he not have been tackling?
must we not have been tackling?
must you not have been tackling?
must they not have been tackling?