I could weatherstrip you could weatherstrip he could weatherstrip we could weatherstrip you could weatherstrip they could weatherstrip
V-ing form
I could be weatherstriping you could be weatherstriping he could be weatherstriping we could be weatherstriping you could be weatherstriping they could be weatherstriping
Perfect
I could have weatherstriped you could have weatherstriped he could have weatherstriped we could have weatherstriped you could have weatherstriped they could have weatherstriped
V-ing perfect
I could have been weatherstriping you could have been weatherstriping he could have been weatherstriping we could have been weatherstriping you could have been weatherstriping they could have been weatherstriping
Negation
Simple form
I couldn't weatherstrip you couldn't weatherstrip he couldn't weatherstrip we couldn't weatherstrip you couldn't weatherstrip they couldn't weatherstrip
V-ing form
I couldn't be weatherstriping you couldn't be weatherstriping he couldn't be weatherstriping we couldn't be weatherstriping you couldn't be weatherstriping they couldn't be weatherstriping
Perfect
I couldn't have weatherstriped you couldn't have weatherstriped he couldn't have weatherstriped we couldn't have weatherstriped you couldn't have weatherstriped they couldn't have weatherstriped
V-ing perfect
I couldn't have been weatherstriping you couldn't have been weatherstriping he couldn't have been weatherstriping we couldn't have been weatherstriping you couldn't have been weatherstriping they couldn't have been weatherstriping
Interrogative form
Simple form
could I weatherstrip? could you weatherstrip? could he weatherstrip? could we weatherstrip? could you weatherstrip? could they weatherstrip?
V-ing form
could I be weatherstriping? could you be weatherstriping? could he be weatherstriping? could we be weatherstriping? could you be weatherstriping? could they be weatherstriping?
Perfect
could I have weatherstriped? could you have weatherstriped? could he have weatherstriped? could we have weatherstriped? could you have weatherstriped? could they have weatherstriped?
V-ing perfect
could I have been weatherstriping? could you have been weatherstriping? could he have been weatherstriping? could we have been weatherstriping? could you have been weatherstriping? could they have been weatherstriping?
Interro-negative form
Simple form
couldn't I weatherstrip? couldn't you weatherstrip? couldn't he weatherstrip? couldn't we weatherstrip? couldn't you weatherstrip? couldn't they weatherstrip?
V-ing form
couldn't I be weatherstriping? couldn't you be weatherstriping? couldn't he be weatherstriping? couldn't we be weatherstriping? couldn't you be weatherstriping? couldn't they be weatherstriping?
Perfect
couldn't I have weatherstriped? couldn't you have weatherstriped? couldn't he have weatherstriped? couldn't we have weatherstriped? couldn't you have weatherstriped? couldn't they have weatherstriped?
V-ing perfect
couldn't I have been weatherstriping? couldn't you have been weatherstriping? couldn't he have been weatherstriping? couldn't we have been weatherstriping? couldn't you have been weatherstriping? couldn't they have been weatherstriping?