English verb conjugation
CAN UNDERLOAD

Regular verb: underload - underloaded - underloaded

Affirmation

Simple form	V-ing form
I can underload you can underload he can underload we can underload you can underload they can underload	I can be underloading you can be underloading he can be underloading we can be underloading you can be underloading they can be underloading
Perfect	V-ing perfect
I can have underloaded you can have underloaded he can have underloaded we can have underloaded you can have underloaded they can have underloaded	I can have been underloading you can have been underloading he can have been underloading we can have been underloading you can have been underloading they can have been underloading

Negation

Simple form	V-ing form
I can't underload you can't underload he can't underload we can't underload you can't underload they can't underload	I can't be underloading you can't be underloading he can't be underloading we can't be underloading you can't be underloading they can't be underloading
Perfect	V-ing perfect
I can't have underloaded you can't have underloaded he can't have underloaded we can't have underloaded you can't have underloaded they can't have underloaded	I can't have been underloading you can't have been underloading he can't have been underloading we can't have been underloading you can't have been underloading they can't have been underloading

Interrogative form

Simple form	V-ing form
can I underload? can you underload? can he underload? can we underload? can you underload? can they underload?	can I be underloading? can you be underloading? can he be underloading? can we be underloading? can you be underloading? can they be underloading?
Perfect	V-ing perfect
can I have underloaded? can you have underloaded? can he have underloaded? can we have underloaded? can you have underloaded? can they have underloaded?	can I have been underloading? can you have been underloading? can he have been underloading? can we have been underloading? can you have been underloading? can they have been underloading?

Interro-negative form

Simple form	V-ing form
can't I underload? can't you underload? can't he underload? can't we underload? can't you underload? can't they underload?	can't I be underloading? can't you be underloading? can't he be underloading? can't we be underloading? can't you be underloading? can't they be underloading?
Perfect	V-ing perfect
can't I have underloaded? can't you have underloaded? can't he have underloaded? can't we have underloaded? can't you have underloaded? can't they have underloaded?	can't I have been underloading? can't you have been underloading? can't he have been underloading? can't we have been underloading? can't you have been underloading? can't they have been underloading?