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 cannot install you cannot install he cannot install we cannot install you cannot install they cannot install	I cannot be installing you cannot be installing he cannot be installing we cannot be installing you cannot be installing they cannot be installing
Perfect	V-ing perfect
I cannot have installed you cannot have installed he cannot have installed we cannot have installed you cannot have installed they cannot have installed	I cannot have been installing you cannot have been installing he cannot have been installing we cannot have been installing you cannot have been installing they cannot 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 I not install? can you not install? can he not install? can we not install? can you not install? can they not install?	can I not be installing? can you not be installing? can he not be installing? can we not be installing? can you not be installing? can they not be installing?
Perfect	V-ing perfect
can I not have installed? can you not have installed? can he not have installed? can we not have installed? can you not have installed? can they not have installed?	can I not have been installing? can you not have been installing? can he not have been installing? can we not have been installing? can you not have been installing? can they not have been installing?