I can underfurnish you can underfurnish he can underfurnish we can underfurnish you can underfurnish they can underfurnish
V-ing form
I can be underfurnishing you can be underfurnishing he can be underfurnishing we can be underfurnishing you can be underfurnishing they can be underfurnishing
Perfect
I can have underfurnished you can have underfurnished he can have underfurnished we can have underfurnished you can have underfurnished they can have underfurnished
V-ing perfect
I can have been underfurnishing you can have been underfurnishing he can have been underfurnishing we can have been underfurnishing you can have been underfurnishing they can have been underfurnishing
Negation
Simple form
I can't underfurnish you can't underfurnish he can't underfurnish we can't underfurnish you can't underfurnish they can't underfurnish
V-ing form
I can't be underfurnishing you can't be underfurnishing he can't be underfurnishing we can't be underfurnishing you can't be underfurnishing they can't be underfurnishing
Perfect
I can't have underfurnished you can't have underfurnished he can't have underfurnished we can't have underfurnished you can't have underfurnished they can't have underfurnished
V-ing perfect
I can't have been underfurnishing you can't have been underfurnishing he can't have been underfurnishing we can't have been underfurnishing you can't have been underfurnishing they can't have been underfurnishing
Interrogative form
Simple form
can I underfurnish? can you underfurnish? can he underfurnish? can we underfurnish? can you underfurnish? can they underfurnish?
V-ing form
can I be underfurnishing? can you be underfurnishing? can he be underfurnishing? can we be underfurnishing? can you be underfurnishing? can they be underfurnishing?
Perfect
can I have underfurnished? can you have underfurnished? can he have underfurnished? can we have underfurnished? can you have underfurnished? can they have underfurnished?
V-ing perfect
can I have been underfurnishing? can you have been underfurnishing? can he have been underfurnishing? can we have been underfurnishing? can you have been underfurnishing? can they have been underfurnishing?
Interro-negative form
Simple form
can't I underfurnish? can't you underfurnish? can't he underfurnish? can't we underfurnish? can't you underfurnish? can't they underfurnish?
V-ing form
can't I be underfurnishing? can't you be underfurnishing? can't he be underfurnishing? can't we be underfurnishing? can't you be underfurnishing? can't they be underfurnishing?
Perfect
can't I have underfurnished? can't you have underfurnished? can't he have underfurnished? can't we have underfurnished? can't you have underfurnished? can't they have underfurnished?
V-ing perfect
can't I have been underfurnishing? can't you have been underfurnishing? can't he have been underfurnishing? can't we have been underfurnishing? can't you have been underfurnishing? can't they have been underfurnishing?