I can overgrow you can overgrow he can overgrow we can overgrow you can overgrow they can overgrow
V-ing form
I can be overgrowing you can be overgrowing he can be overgrowing we can be overgrowing you can be overgrowing they can be overgrowing
Perfect
I can have overgrown you can have overgrown he can have overgrown we can have overgrown you can have overgrown they can have overgrown
V-ing perfect
I can have been overgrowing you can have been overgrowing he can have been overgrowing we can have been overgrowing you can have been overgrowing they can have been overgrowing
Negation
Simple form
I cannot overgrow you cannot overgrow he cannot overgrow we cannot overgrow you cannot overgrow they cannot overgrow
V-ing form
I cannot be overgrowing you cannot be overgrowing he cannot be overgrowing we cannot be overgrowing you cannot be overgrowing they cannot be overgrowing
Perfect
I cannot have overgrown you cannot have overgrown he cannot have overgrown we cannot have overgrown you cannot have overgrown they cannot have overgrown
V-ing perfect
I cannot have been overgrowing you cannot have been overgrowing he cannot have been overgrowing we cannot have been overgrowing you cannot have been overgrowing they cannot have been overgrowing
Interrogative form
Simple form
can I overgrow? can you overgrow? can he overgrow? can we overgrow? can you overgrow? can they overgrow?
V-ing form
can I be overgrowing? can you be overgrowing? can he be overgrowing? can we be overgrowing? can you be overgrowing? can they be overgrowing?
Perfect
can I have overgrown? can you have overgrown? can he have overgrown? can we have overgrown? can you have overgrown? can they have overgrown?
V-ing perfect
can I have been overgrowing? can you have been overgrowing? can he have been overgrowing? can we have been overgrowing? can you have been overgrowing? can they have been overgrowing?
Interro-negative form
Simple form
can I not overgrow? can you not overgrow? can he not overgrow? can we not overgrow? can you not overgrow? can they not overgrow?
V-ing form
can I not be overgrowing? can you not be overgrowing? can he not be overgrowing? can we not be overgrowing? can you not be overgrowing? can they not be overgrowing?
Perfect
can I not have overgrown? can you not have overgrown? can he not have overgrown? can we not have overgrown? can you not have overgrown? can they not have overgrown?
V-ing perfect
can I not have been overgrowing? can you not have been overgrowing? can he not have been overgrowing? can we not have been overgrowing? can you not have been overgrowing? can they not have been overgrowing?