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