I may endeavour you may endeavour he may endeavour we may endeavour you may endeavour they may endeavour
V-ing form
I may be endeavouring you may be endeavouring he may be endeavouring we may be endeavouring you may be endeavouring they may be endeavouring
Perfect
I may have endeavoured you may have endeavoured he may have endeavoured we may have endeavoured you may have endeavoured they may have endeavoured
V-ing perfect
I may have been endeavouring you may have been endeavouring he may have been endeavouring we may have been endeavouring you may have been endeavouring they may have been endeavouring
Negation
Simple form
I may not endeavour you may not endeavour he may not endeavour we may not endeavour you may not endeavour they may not endeavour
V-ing form
I may not be endeavouring you may not be endeavouring he may not be endeavouring we may not be endeavouring you may not be endeavouring they may not be endeavouring
Perfect
I may not have endeavoured you may not have endeavoured he may not have endeavoured we may not have endeavoured you may not have endeavoured they may not have endeavoured
V-ing perfect
I may not have been endeavouring you may not have been endeavouring he may not have been endeavouring we may not have been endeavouring you may not have been endeavouring they may not have been endeavouring
Interrogative form
Simple form
may I endeavour? may you endeavour? may he endeavour? may we endeavour? may you endeavour? may they endeavour?
V-ing form
may I be endeavouring? may you be endeavouring? may he be endeavouring? may we be endeavouring? may you be endeavouring? may they be endeavouring?
Perfect
may I have endeavoured? may you have endeavoured? may he have endeavoured? may we have endeavoured? may you have endeavoured? may they have endeavoured?
V-ing perfect
may I have been endeavouring? may you have been endeavouring? may he have been endeavouring? may we have been endeavouring? may you have been endeavouring? may they have been endeavouring?
Interro-negative form
Simple form
may I not endeavour? may you not endeavour? may he not endeavour? may we not endeavour? may you not endeavour? may they not endeavour?
V-ing form
may I not be endeavouring? may you not be endeavouring? may he not be endeavouring? may we not be endeavouring? may you not be endeavouring? may they not be endeavouring?
Perfect
may I not have endeavoured? may you not have endeavoured? may he not have endeavoured? may we not have endeavoured? may you not have endeavoured? may they not have endeavoured?
V-ing perfect
may I not have been endeavouring? may you not have been endeavouring? may he not have been endeavouring? may we not have been endeavouring? may you not have been endeavouring? may they not have been endeavouring?