I can search you can search he can search we can search you can search they can search
V-ing form
I can be searching you can be searching he can be searching we can be searching you can be searching they can be searching
Perfect
I can have searched you can have searched he can have searched we can have searched you can have searched they can have searched
V-ing perfect
I can have been searching you can have been searching he can have been searching we can have been searching you can have been searching they can have been searching
Negation
Simple form
I cannot search you cannot search he cannot search we cannot search you cannot search they cannot search
V-ing form
I cannot be searching you cannot be searching he cannot be searching we cannot be searching you cannot be searching they cannot be searching
Perfect
I cannot have searched you cannot have searched he cannot have searched we cannot have searched you cannot have searched they cannot have searched
V-ing perfect
I cannot have been searching you cannot have been searching he cannot have been searching we cannot have been searching you cannot have been searching they cannot have been searching
Interrogative form
Simple form
can I search? can you search? can he search? can we search? can you search? can they search?
V-ing form
can I be searching? can you be searching? can he be searching? can we be searching? can you be searching? can they be searching?
Perfect
can I have searched? can you have searched? can he have searched? can we have searched? can you have searched? can they have searched?
V-ing perfect
can I have been searching? can you have been searching? can he have been searching? can we have been searching? can you have been searching? can they have been searching?
Interro-negative form
Simple form
can I not search? can you not search? can he not search? can we not search? can you not search? can they not search?
V-ing form
can I not be searching? can you not be searching? can he not be searching? can we not be searching? can you not be searching? can they not be searching?
Perfect
can I not have searched? can you not have searched? can he not have searched? can we not have searched? can you not have searched? can they not have searched?
V-ing perfect
can I not have been searching? can you not have been searching? can he not have been searching? can we not have been searching? can you not have been searching? can they not have been searching?