I can introduce you can introduce he can introduce we can introduce you can introduce they can introduce
V-ing form
I can be introducing you can be introducing he can be introducing we can be introducing you can be introducing they can be introducing
Perfect
I can have introduced you can have introduced he can have introduced we can have introduced you can have introduced they can have introduced
V-ing perfect
I can have been introducing you can have been introducing he can have been introducing we can have been introducing you can have been introducing they can have been introducing
Negation
Simple form
I can't introduce you can't introduce he can't introduce we can't introduce you can't introduce they can't introduce
V-ing form
I can't be introducing you can't be introducing he can't be introducing we can't be introducing you can't be introducing they can't be introducing
Perfect
I can't have introduced you can't have introduced he can't have introduced we can't have introduced you can't have introduced they can't have introduced
V-ing perfect
I can't have been introducing you can't have been introducing he can't have been introducing we can't have been introducing you can't have been introducing they can't have been introducing
Interrogative form
Simple form
can I introduce? can you introduce? can he introduce? can we introduce? can you introduce? can they introduce?
V-ing form
can I be introducing? can you be introducing? can he be introducing? can we be introducing? can you be introducing? can they be introducing?
Perfect
can I have introduced? can you have introduced? can he have introduced? can we have introduced? can you have introduced? can they have introduced?
V-ing perfect
can I have been introducing? can you have been introducing? can he have been introducing? can we have been introducing? can you have been introducing? can they have been introducing?
Interro-negative form
Simple form
can't I introduce? can't you introduce? can't he introduce? can't we introduce? can't you introduce? can't they introduce?
V-ing form
can't I be introducing? can't you be introducing? can't he be introducing? can't we be introducing? can't you be introducing? can't they be introducing?
Perfect
can't I have introduced? can't you have introduced? can't he have introduced? can't we have introduced? can't you have introduced? can't they have introduced?
V-ing perfect
can't I have been introducing? can't you have been introducing? can't he have been introducing? can't we have been introducing? can't you have been introducing? can't they have been introducing?