I could acetify you could acetify she could acetify we could acetify you could acetify they could acetify
V-ing form
I could be acetifying you could be acetifying she could be acetifying we could be acetifying you could be acetifying they could be acetifying
Perfect
I could have acetified you could have acetified she could have acetified we could have acetified you could have acetified they could have acetified
V-ing perfect
I could have been acetifying you could have been acetifying she could have been acetifying we could have been acetifying you could have been acetifying they could have been acetifying
Negation
Simple form
I couldn't acetify you couldn't acetify she couldn't acetify we couldn't acetify you couldn't acetify they couldn't acetify
V-ing form
I couldn't be acetifying you couldn't be acetifying she couldn't be acetifying we couldn't be acetifying you couldn't be acetifying they couldn't be acetifying
Perfect
I couldn't have acetified you couldn't have acetified she couldn't have acetified we couldn't have acetified you couldn't have acetified they couldn't have acetified
V-ing perfect
I couldn't have been acetifying you couldn't have been acetifying she couldn't have been acetifying we couldn't have been acetifying you couldn't have been acetifying they couldn't have been acetifying
Interrogative form
Simple form
could I acetify? could you acetify? could she acetify? could we acetify? could you acetify? could they acetify?
V-ing form
could I be acetifying? could you be acetifying? could she be acetifying? could we be acetifying? could you be acetifying? could they be acetifying?
Perfect
could I have acetified? could you have acetified? could she have acetified? could we have acetified? could you have acetified? could they have acetified?
V-ing perfect
could I have been acetifying? could you have been acetifying? could she have been acetifying? could we have been acetifying? could you have been acetifying? could they have been acetifying?
Interro-negative form
Simple form
couldn't I acetify? couldn't you acetify? couldn't she acetify? couldn't we acetify? couldn't you acetify? couldn't they acetify?
V-ing form
couldn't I be acetifying? couldn't you be acetifying? couldn't she be acetifying? couldn't we be acetifying? couldn't you be acetifying? couldn't they be acetifying?
Perfect
couldn't I have acetified? couldn't you have acetified? couldn't she have acetified? couldn't we have acetified? couldn't you have acetified? couldn't they have acetified?
V-ing perfect
couldn't I have been acetifying? couldn't you have been acetifying? couldn't she have been acetifying? couldn't we have been acetifying? couldn't you have been acetifying? couldn't they have been acetifying?