I can effuse you can effuse he can effuse we can effuse you can effuse they can effuse
V-ing form
I can be effusing you can be effusing he can be effusing we can be effusing you can be effusing they can be effusing
Perfect
I can have effused you can have effused he can have effused we can have effused you can have effused they can have effused
V-ing perfect
I can have been effusing you can have been effusing he can have been effusing we can have been effusing you can have been effusing they can have been effusing
Negation
Simple form
I cannot effuse you cannot effuse he cannot effuse we cannot effuse you cannot effuse they cannot effuse
V-ing form
I cannot be effusing you cannot be effusing he cannot be effusing we cannot be effusing you cannot be effusing they cannot be effusing
Perfect
I cannot have effused you cannot have effused he cannot have effused we cannot have effused you cannot have effused they cannot have effused
V-ing perfect
I cannot have been effusing you cannot have been effusing he cannot have been effusing we cannot have been effusing you cannot have been effusing they cannot have been effusing
Interrogative form
Simple form
can I effuse? can you effuse? can he effuse? can we effuse? can you effuse? can they effuse?
V-ing form
can I be effusing? can you be effusing? can he be effusing? can we be effusing? can you be effusing? can they be effusing?
Perfect
can I have effused? can you have effused? can he have effused? can we have effused? can you have effused? can they have effused?
V-ing perfect
can I have been effusing? can you have been effusing? can he have been effusing? can we have been effusing? can you have been effusing? can they have been effusing?
Interro-negative form
Simple form
can I not effuse? can you not effuse? can he not effuse? can we not effuse? can you not effuse? can they not effuse?
V-ing form
can I not be effusing? can you not be effusing? can he not be effusing? can we not be effusing? can you not be effusing? can they not be effusing?
Perfect
can I not have effused? can you not have effused? can he not have effused? can we not have effused? can you not have effused? can they not have effused?
V-ing perfect
can I not have been effusing? can you not have been effusing? can he not have been effusing? can we not have been effusing? can you not have been effusing? can they not have been effusing?