I can acidify you can acidify she can acidify we can acidify you can acidify they can acidify
V-ing form
I can be acidifying you can be acidifying she can be acidifying we can be acidifying you can be acidifying they can be acidifying
Perfect
I can have acidified you can have acidified she can have acidified we can have acidified you can have acidified they can have acidified
V-ing perfect
I can have been acidifying you can have been acidifying she can have been acidifying we can have been acidifying you can have been acidifying they can have been acidifying
Negation
Simple form
I cannot acidify you cannot acidify she cannot acidify we cannot acidify you cannot acidify they cannot acidify
V-ing form
I cannot be acidifying you cannot be acidifying she cannot be acidifying we cannot be acidifying you cannot be acidifying they cannot be acidifying
Perfect
I cannot have acidified you cannot have acidified she cannot have acidified we cannot have acidified you cannot have acidified they cannot have acidified
V-ing perfect
I cannot have been acidifying you cannot have been acidifying she cannot have been acidifying we cannot have been acidifying you cannot have been acidifying they cannot have been acidifying
Interrogative form
Simple form
can I acidify? can you acidify? can she acidify? can we acidify? can you acidify? can they acidify?
V-ing form
can I be acidifying? can you be acidifying? can she be acidifying? can we be acidifying? can you be acidifying? can they be acidifying?
Perfect
can I have acidified? can you have acidified? can she have acidified? can we have acidified? can you have acidified? can they have acidified?
V-ing perfect
can I have been acidifying? can you have been acidifying? can she have been acidifying? can we have been acidifying? can you have been acidifying? can they have been acidifying?
Interro-negative form
Simple form
can I not acidify? can you not acidify? can she not acidify? can we not acidify? can you not acidify? can they not acidify?
V-ing form
can I not be acidifying? can you not be acidifying? can she not be acidifying? can we not be acidifying? can you not be acidifying? can they not be acidifying?
Perfect
can I not have acidified? can you not have acidified? can she not have acidified? can we not have acidified? can you not have acidified? can they not have acidified?
V-ing perfect
can I not have been acidifying? can you not have been acidifying? can she not have been acidifying? can we not have been acidifying? can you not have been acidifying? can they not have been acidifying?