can require
Regular verb: require - required- required

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can require
you can require
she can require
we can require
you can require
they can require 	I can be requiring
you can be requiring
she can be requiring
we can be requiring
you can be requiring
they can be requiring	I can have required
you can have required
she can have required
we can have required
you can have required
they can have required	I can have been requiring
you can have been requiring
she can have been requiring
we can have been requiring
you can have been requiring
they can have been requiring	

Negation 	
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I can't require
you can't require
she can't require
we can't require
you can't require
they can't require 	I can't be requiring
you can't be requiring
she can't be requiring
we can't be requiring
you can't be requiring
they can't be requiring	I can't have required
you can't have required
she can't have required
we can't have required
you can't have required
they can't have required	I can't have been requiring
you can't have been requiring
she can't have been requiring
we can't have been requiring
you can't have been requiring
they can't have been requiring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I require?
can you require?
can she require?
can we require?
can you require?
can they require? 	can I be requiring?
can you be requiring?
can she be requiring?
can we be requiring?
can you be requiring?
can they be requiring? 	can I have required?
can you have required?
can she have required?
can we have required?
can you have required?
can they have required? 	can I have been requiring?
can you have been requiring?
can she have been requiring?
can we have been requiring?
can you have been requiring?
can they have been requiring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I require?
can't you require?
can't she require?
can't we require?
can't you require?
can't they require? 	can't I be requiring?
can't you be requiring?
can't she be requiring?
can't we be requiring?
can't you be requiring?
can't they be requiring? 	can't I have required?
can't you have required?
can't she have required?
can't we have required?
can't you have required?
can't they have required? 	can't I have been requiring?
can't you have been requiring?
can't she have been requiring?
can't we have been requiring?
can't you have been requiring?
can't they have been requiring?