English verb conjugation
CAN LOOK

Regular verb: look - looked - looked

Affirmation

Simple form	V-ing form
I can look you can look he can look we can look you can look they can look	I can be looking you can be looking he can be looking we can be looking you can be looking they can be looking
Perfect	V-ing perfect
I can have looked you can have looked he can have looked we can have looked you can have looked they can have looked	I can have been looking you can have been looking he can have been looking we can have been looking you can have been looking they can have been looking

Negation

Simple form	V-ing form
I cannot look you cannot look he cannot look we cannot look you cannot look they cannot look	I cannot be looking you cannot be looking he cannot be looking we cannot be looking you cannot be looking they cannot be looking
Perfect	V-ing perfect
I cannot have looked you cannot have looked he cannot have looked we cannot have looked you cannot have looked they cannot have looked	I cannot have been looking you cannot have been looking he cannot have been looking we cannot have been looking you cannot have been looking they cannot have been looking

Interrogative form

Simple form	V-ing form
can I look? can you look? can he look? can we look? can you look? can they look?	can I be looking? can you be looking? can he be looking? can we be looking? can you be looking? can they be looking?
Perfect	V-ing perfect
can I have looked? can you have looked? can he have looked? can we have looked? can you have looked? can they have looked?	can I have been looking? can you have been looking? can he have been looking? can we have been looking? can you have been looking? can they have been looking?

Interro-negative form

Simple form	V-ing form
can I not look? can you not look? can he not look? can we not look? can you not look? can they not look?	can I not be looking? can you not be looking? can he not be looking? can we not be looking? can you not be looking? can they not be looking?
Perfect	V-ing perfect
can I not have looked? can you not have looked? can he not have looked? can we not have looked? can you not have looked? can they not have looked?	can I not have been looking? can you not have been looking? can he not have been looking? can we not have been looking? can you not have been looking? can they not have been looking?