I can gratify you can gratify he can gratify we can gratify you can gratify they can gratify
V-ing form
I can be gratifying you can be gratifying he can be gratifying we can be gratifying you can be gratifying they can be gratifying
Perfect
I can have gratified you can have gratified he can have gratified we can have gratified you can have gratified they can have gratified
V-ing perfect
I can have been gratifying you can have been gratifying he can have been gratifying we can have been gratifying you can have been gratifying they can have been gratifying
Negation
Simple form
I cannot gratify you cannot gratify he cannot gratify we cannot gratify you cannot gratify they cannot gratify
V-ing form
I cannot be gratifying you cannot be gratifying he cannot be gratifying we cannot be gratifying you cannot be gratifying they cannot be gratifying
Perfect
I cannot have gratified you cannot have gratified he cannot have gratified we cannot have gratified you cannot have gratified they cannot have gratified
V-ing perfect
I cannot have been gratifying you cannot have been gratifying he cannot have been gratifying we cannot have been gratifying you cannot have been gratifying they cannot have been gratifying
Interrogative form
Simple form
can I gratify? can you gratify? can he gratify? can we gratify? can you gratify? can they gratify?
V-ing form
can I be gratifying? can you be gratifying? can he be gratifying? can we be gratifying? can you be gratifying? can they be gratifying?
Perfect
can I have gratified? can you have gratified? can he have gratified? can we have gratified? can you have gratified? can they have gratified?
V-ing perfect
can I have been gratifying? can you have been gratifying? can he have been gratifying? can we have been gratifying? can you have been gratifying? can they have been gratifying?
Interro-negative form
Simple form
can I not gratify? can you not gratify? can he not gratify? can we not gratify? can you not gratify? can they not gratify?
V-ing form
can I not be gratifying? can you not be gratifying? can he not be gratifying? can we not be gratifying? can you not be gratifying? can they not be gratifying?
Perfect
can I not have gratified? can you not have gratified? can he not have gratified? can we not have gratified? can you not have gratified? can they not have gratified?
V-ing perfect
can I not have been gratifying? can you not have been gratifying? can he not have been gratifying? can we not have been gratifying? can you not have been gratifying? can they not have been gratifying?