I can gasify you can gasify she can gasify we can gasify you can gasify they can gasify
V-ing form
I can be gasifying you can be gasifying she can be gasifying we can be gasifying you can be gasifying they can be gasifying
Perfect
I can have gasified you can have gasified she can have gasified we can have gasified you can have gasified they can have gasified
V-ing perfect
I can have been gasifying you can have been gasifying she can have been gasifying we can have been gasifying you can have been gasifying they can have been gasifying
Negation
Simple form
I can't gasify you can't gasify she can't gasify we can't gasify you can't gasify they can't gasify
V-ing form
I can't be gasifying you can't be gasifying she can't be gasifying we can't be gasifying you can't be gasifying they can't be gasifying
Perfect
I can't have gasified you can't have gasified she can't have gasified we can't have gasified you can't have gasified they can't have gasified
V-ing perfect
I can't have been gasifying you can't have been gasifying she can't have been gasifying we can't have been gasifying you can't have been gasifying they can't have been gasifying
Interrogative form
Simple form
can I gasify? can you gasify? can she gasify? can we gasify? can you gasify? can they gasify?
V-ing form
can I be gasifying? can you be gasifying? can she be gasifying? can we be gasifying? can you be gasifying? can they be gasifying?
Perfect
can I have gasified? can you have gasified? can she have gasified? can we have gasified? can you have gasified? can they have gasified?
V-ing perfect
can I have been gasifying? can you have been gasifying? can she have been gasifying? can we have been gasifying? can you have been gasifying? can they have been gasifying?
Interro-negative form
Simple form
can't I gasify? can't you gasify? can't she gasify? can't we gasify? can't you gasify? can't they gasify?
V-ing form
can't I be gasifying? can't you be gasifying? can't she be gasifying? can't we be gasifying? can't you be gasifying? can't they be gasifying?
Perfect
can't I have gasified? can't you have gasified? can't she have gasified? can't we have gasified? can't you have gasified? can't they have gasified?
V-ing perfect
can't I have been gasifying? can't you have been gasifying? can't she have been gasifying? can't we have been gasifying? can't you have been gasifying? can't they have been gasifying?