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 can't effuse you can't effuse he can't effuse we can't effuse you can't effuse they can't effuse
V-ing form
I can't be effusing you can't be effusing he can't be effusing we can't be effusing you can't be effusing they can't be effusing
Perfect
I can't have effused you can't have effused he can't have effused we can't have effused you can't have effused they can't have effused
V-ing perfect
I can't have been effusing you can't have been effusing he can't have been effusing we can't have been effusing you can't have been effusing they can't 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't I effuse? can't you effuse? can't he effuse? can't we effuse? can't you effuse? can't they effuse?
V-ing form
can't I be effusing? can't you be effusing? can't he be effusing? can't we be effusing? can't you be effusing? can't they be effusing?
Perfect
can't I have effused? can't you have effused? can't he have effused? can't we have effused? can't you have effused? can't they have effused?
V-ing perfect
can't I have been effusing? can't you have been effusing? can't he have been effusing? can't we have been effusing? can't you have been effusing? can't they have been effusing?