I can lift you can lift she can lift we can lift you can lift they can lift
V-ing form
I can be lifting you can be lifting she can be lifting we can be lifting you can be lifting they can be lifting
Perfect
I can have lifted you can have lifted she can have lifted we can have lifted you can have lifted they can have lifted
V-ing perfect
I can have been lifting you can have been lifting she can have been lifting we can have been lifting you can have been lifting they can have been lifting
Negation
Simple form
I cannot lift you cannot lift she cannot lift we cannot lift you cannot lift they cannot lift
V-ing form
I cannot be lifting you cannot be lifting she cannot be lifting we cannot be lifting you cannot be lifting they cannot be lifting
Perfect
I cannot have lifted you cannot have lifted she cannot have lifted we cannot have lifted you cannot have lifted they cannot have lifted
V-ing perfect
I cannot have been lifting you cannot have been lifting she cannot have been lifting we cannot have been lifting you cannot have been lifting they cannot have been lifting
Interrogative form
Simple form
can I lift? can you lift? can she lift? can we lift? can you lift? can they lift?
V-ing form
can I be lifting? can you be lifting? can she be lifting? can we be lifting? can you be lifting? can they be lifting?
Perfect
can I have lifted? can you have lifted? can she have lifted? can we have lifted? can you have lifted? can they have lifted?
V-ing perfect
can I have been lifting? can you have been lifting? can she have been lifting? can we have been lifting? can you have been lifting? can they have been lifting?
Interro-negative form
Simple form
can I not lift? can you not lift? can she not lift? can we not lift? can you not lift? can they not lift?
V-ing form
can I not be lifting? can you not be lifting? can she not be lifting? can we not be lifting? can you not be lifting? can they not be lifting?
Perfect
can I not have lifted? can you not have lifted? can she not have lifted? can we not have lifted? can you not have lifted? can they not have lifted?
V-ing perfect
can I not have been lifting? can you not have been lifting? can she not have been lifting? can we not have been lifting? can you not have been lifting? can they not have been lifting?