can endeavour
Regular verb: endeavour - endeavoured- endeavoured

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can endeavour
you can endeavour
she can endeavour
we can endeavour
you can endeavour
they can endeavour 	I can be endeavouring
you can be endeavouring
she can be endeavouring
we can be endeavouring
you can be endeavouring
they can be endeavouring	I can have endeavoured
you can have endeavoured
she can have endeavoured
we can have endeavoured
you can have endeavoured
they can have endeavoured	I can have been endeavouring
you can have been endeavouring
she can have been endeavouring
we can have been endeavouring
you can have been endeavouring
they can have been endeavouring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot endeavour
you cannot endeavour
she cannot endeavour
we cannot endeavour
you cannot endeavour
they cannot endeavour 	I cannot be endeavouring
you cannot be endeavouring
she cannot be endeavouring
we cannot be endeavouring
you cannot be endeavouring
they cannot be endeavouring	I cannot have endeavoured
you cannot have endeavoured
she cannot have endeavoured
we cannot have endeavoured
you cannot have endeavoured
they cannot have endeavoured	I cannot have been endeavouring
you cannot have been endeavouring
she cannot have been endeavouring
we cannot have been endeavouring
you cannot have been endeavouring
they cannot have been endeavouring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I endeavour?
can you endeavour?
can she endeavour?
can we endeavour?
can you endeavour?
can they endeavour? 	can I be endeavouring?
can you be endeavouring?
can she be endeavouring?
can we be endeavouring?
can you be endeavouring?
can they be endeavouring? 	can I have endeavoured?
can you have endeavoured?
can she have endeavoured?
can we have endeavoured?
can you have endeavoured?
can they have endeavoured? 	can I have been endeavouring?
can you have been endeavouring?
can she have been endeavouring?
can we have been endeavouring?
can you have been endeavouring?
can they have been endeavouring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not endeavour?
can you not endeavour?
can she not endeavour?
can we not endeavour?
can you not endeavour?
can they not endeavour? 	can I not be endeavouring?
can you not be endeavouring?
can she not be endeavouring?
can we not be endeavouring?
can you not be endeavouring?
can they not be endeavouring? 	can I not have endeavoured?
can you not have endeavoured?
can she not have endeavoured?
can we not have endeavoured?
can you not have endeavoured?
can they not have endeavoured? 	can I not have been endeavouring?
can you not have been endeavouring?
can she not have been endeavouring?
can we not have been endeavouring?
can you not have been endeavouring?
can they not have been endeavouring?