Regular verb: buckle - buckled - buckled
Simple form | V-ing form |
I must buckle you must buckle he must buckle we must buckle you must buckle they must buckle | I must be buckling you must be buckling he must be buckling we must be buckling you must be buckling they must be buckling |
Perfect | V-ing perfect |
I must have buckled you must have buckled he must have buckled we must have buckled you must have buckled they must have buckled | I must have been buckling you must have been buckling he must have been buckling we must have been buckling you must have been buckling they must have been buckling |
Simple form | V-ing form |
I must not buckle you must not buckle he must not buckle we must not buckle you must not buckle they must not buckle | I must not be buckling you must not be buckling he must not be buckling we must not be buckling you must not be buckling they must not be buckling |
Perfect | V-ing perfect |
I must not have buckled you must not have buckled he must not have buckled we must not have buckled you must not have buckled they must not have buckled | I must not have been buckling you must not have been buckling he must not have been buckling we must not have been buckling you must not have been buckling they must not have been buckling |
Simple form | V-ing form |
must I buckle? must you buckle? must he buckle? must we buckle? must you buckle? must they buckle? | must I be buckling? must you be buckling? must he be buckling? must we be buckling? must you be buckling? must they be buckling? |
Perfect | V-ing perfect |
must I have buckled? must you have buckled? must he have buckled? must we have buckled? must you have buckled? must they have buckled? | must I have been buckling? must you have been buckling? must he have been buckling? must we have been buckling? must you have been buckling? must they have been buckling? |
Simple form | V-ing form |
must I not buckle? must you not buckle? must he not buckle? must we not buckle? must you not buckle? must they not buckle? | must I not be buckling? must you not be buckling? must he not be buckling? must we not be buckling? must you not be buckling? must they not be buckling? |
Perfect | V-ing perfect |
must I not have buckled? must you not have buckled? must he not have buckled? must we not have buckled? must you not have buckled? must they not have buckled? | must I not have been buckling? must you not have been buckling? must he not have been buckling? must we not have been buckling? must you not have been buckling? must they not have been buckling? |