I can admire you can admire he can admire we can admire you can admire they can admire
V-ing form
I can be admiring you can be admiring he can be admiring we can be admiring you can be admiring they can be admiring
Perfect
I can have admired you can have admired he can have admired we can have admired you can have admired they can have admired
V-ing perfect
I can have been admiring you can have been admiring he can have been admiring we can have been admiring you can have been admiring they can have been admiring
Negation
Simple form
I cannot admire you cannot admire he cannot admire we cannot admire you cannot admire they cannot admire
V-ing form
I cannot be admiring you cannot be admiring he cannot be admiring we cannot be admiring you cannot be admiring they cannot be admiring
Perfect
I cannot have admired you cannot have admired he cannot have admired we cannot have admired you cannot have admired they cannot have admired
V-ing perfect
I cannot have been admiring you cannot have been admiring he cannot have been admiring we cannot have been admiring you cannot have been admiring they cannot have been admiring
Interrogative form
Simple form
can I admire? can you admire? can he admire? can we admire? can you admire? can they admire?
V-ing form
can I be admiring? can you be admiring? can he be admiring? can we be admiring? can you be admiring? can they be admiring?
Perfect
can I have admired? can you have admired? can he have admired? can we have admired? can you have admired? can they have admired?
V-ing perfect
can I have been admiring? can you have been admiring? can he have been admiring? can we have been admiring? can you have been admiring? can they have been admiring?
Interro-negative form
Simple form
can I not admire? can you not admire? can he not admire? can we not admire? can you not admire? can they not admire?
V-ing form
can I not be admiring? can you not be admiring? can he not be admiring? can we not be admiring? can you not be admiring? can they not be admiring?
Perfect
can I not have admired? can you not have admired? can he not have admired? can we not have admired? can you not have admired? can they not have admired?
V-ing perfect
can I not have been admiring? can you not have been admiring? can he not have been admiring? can we not have been admiring? can you not have been admiring? can they not have been admiring?