English verb conjugation
CAN INSTALL

Regular verb: install - installed - installed

Affirmation

Simple form	V-ing form
I can install you can install he can install we can install you can install they can install	I can be installing you can be installing he can be installing we can be installing you can be installing they can be installing
Perfect	V-ing perfect
I can have installed you can have installed he can have installed we can have installed you can have installed they can have installed	I can have been installing you can have been installing he can have been installing we can have been installing you can have been installing they can have been installing

Negation

Simple form	V-ing form
I can't install you can't install he can't install we can't install you can't install they can't install	I can't be installing you can't be installing he can't be installing we can't be installing you can't be installing they can't be installing
Perfect	V-ing perfect
I can't have installed you can't have installed he can't have installed we can't have installed you can't have installed they can't have installed	I can't have been installing you can't have been installing he can't have been installing we can't have been installing you can't have been installing they can't have been installing

Interrogative form

Simple form	V-ing form
can I install? can you install? can he install? can we install? can you install? can they install?	can I be installing? can you be installing? can he be installing? can we be installing? can you be installing? can they be installing?
Perfect	V-ing perfect
can I have installed? can you have installed? can he have installed? can we have installed? can you have installed? can they have installed?	can I have been installing? can you have been installing? can he have been installing? can we have been installing? can you have been installing? can they have been installing?

Interro-negative form

Simple form	V-ing form
can't I install? can't you install? can't he install? can't we install? can't you install? can't they install?	can't I be installing? can't you be installing? can't he be installing? can't we be installing? can't you be installing? can't they be installing?
Perfect	V-ing perfect
can't I have installed? can't you have installed? can't he have installed? can't we have installed? can't you have installed? can't they have installed?	can't I have been installing? can't you have been installing? can't he have been installing? can't we have been installing? can't you have been installing? can't they have been installing?