must catch
Irregular verb: catch - caught- caught

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must catch
you must catch
he must catch
we must catch
you must catch
they must catch 	I must be catching
you must be catching
he must be catching
we must be catching
you must be catching
they must be catching	I must have caught
you must have caught
he must have caught
we must have caught
you must have caught
they must have caught	I must have been catching
you must have been catching
he must have been catching
we must have been catching
you must have been catching
they must have been catching	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not catch
you must not catch
he must not catch
we must not catch
you must not catch
they must not catch 	I must not be catching
you must not be catching
he must not be catching
we must not be catching
you must not be catching
they must not be catching	I must not have caught
you must not have caught
he must not have caught
we must not have caught
you must not have caught
they must not have caught	I must not have been catching
you must not have been catching
he must not have been catching
we must not have been catching
you must not have been catching
they must not have been catching	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I catch?
must you catch?
must he catch?
must we catch?
must you catch?
must they catch? 	must I be catching?
must you be catching?
must he be catching?
must we be catching?
must you be catching?
must they be catching? 	must I have caught?
must you have caught?
must he have caught?
must we have caught?
must you have caught?
must they have caught? 	must I have been catching?
must you have been catching?
must he have been catching?
must we have been catching?
must you have been catching?
must they have been catching? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not catch?
must you not catch?
must he not catch?
must we not catch?
must you not catch?
must they not catch? 	must I not be catching?
must you not be catching?
must he not be catching?
must we not be catching?
must you not be catching?
must they not be catching? 	must I not have caught?
must you not have caught?
must he not have caught?
must we not have caught?
must you not have caught?
must they not have caught? 	must I not have been catching?
must you not have been catching?
must he not have been catching?
must we not have been catching?
must you not have been catching?
must they not have been catching?