I may precaution you may precaution he may precaution we may precaution you may precaution they may precaution
V-ing form
I may be precautioning you may be precautioning he may be precautioning we may be precautioning you may be precautioning they may be precautioning
Perfect
I may have precautioned you may have precautioned he may have precautioned we may have precautioned you may have precautioned they may have precautioned
V-ing perfect
I may have been precautioning you may have been precautioning he may have been precautioning we may have been precautioning you may have been precautioning they may have been precautioning
Negation
Simple form
I may not precaution you may not precaution he may not precaution we may not precaution you may not precaution they may not precaution
V-ing form
I may not be precautioning you may not be precautioning he may not be precautioning we may not be precautioning you may not be precautioning they may not be precautioning
Perfect
I may not have precautioned you may not have precautioned he may not have precautioned we may not have precautioned you may not have precautioned they may not have precautioned
V-ing perfect
I may not have been precautioning you may not have been precautioning he may not have been precautioning we may not have been precautioning you may not have been precautioning they may not have been precautioning
Interrogative form
Simple form
may I precaution? may you precaution? may he precaution? may we precaution? may you precaution? may they precaution?
V-ing form
may I be precautioning? may you be precautioning? may he be precautioning? may we be precautioning? may you be precautioning? may they be precautioning?
Perfect
may I have precautioned? may you have precautioned? may he have precautioned? may we have precautioned? may you have precautioned? may they have precautioned?
V-ing perfect
may I have been precautioning? may you have been precautioning? may he have been precautioning? may we have been precautioning? may you have been precautioning? may they have been precautioning?
Interro-negative form
Simple form
may I not precaution? may you not precaution? may he not precaution? may we not precaution? may you not precaution? may they not precaution?
V-ing form
may I not be precautioning? may you not be precautioning? may he not be precautioning? may we not be precautioning? may you not be precautioning? may they not be precautioning?
Perfect
may I not have precautioned? may you not have precautioned? may he not have precautioned? may we not have precautioned? may you not have precautioned? may they not have precautioned?
V-ing perfect
may I not have been precautioning? may you not have been precautioning? may he not have been precautioning? may we not have been precautioning? may you not have been precautioning? may they not have been precautioning?