I could salivate you could salivate he could salivate we could salivate you could salivate they could salivate
V-ing form
I could be salivating you could be salivating he could be salivating we could be salivating you could be salivating they could be salivating
Perfect
I could have salivated you could have salivated he could have salivated we could have salivated you could have salivated they could have salivated
V-ing perfect
I could have been salivating you could have been salivating he could have been salivating we could have been salivating you could have been salivating they could have been salivating
Negation
Simple form
I could not salivate you could not salivate he could not salivate we could not salivate you could not salivate they could not salivate
V-ing form
I could not be salivating you could not be salivating he could not be salivating we could not be salivating you could not be salivating they could not be salivating
Perfect
I could not have salivated you could not have salivated he could not have salivated we could not have salivated you could not have salivated they could not have salivated
V-ing perfect
I could not have been salivating you could not have been salivating he could not have been salivating we could not have been salivating you could not have been salivating they could not have been salivating
Interrogative form
Simple form
could I salivate? could you salivate? could he salivate? could we salivate? could you salivate? could they salivate?
V-ing form
could I be salivating? could you be salivating? could he be salivating? could we be salivating? could you be salivating? could they be salivating?
Perfect
could I have salivated? could you have salivated? could he have salivated? could we have salivated? could you have salivated? could they have salivated?
V-ing perfect
could I have been salivating? could you have been salivating? could he have been salivating? could we have been salivating? could you have been salivating? could they have been salivating?
Interro-negative form
Simple form
could I not salivate? could you not salivate? could he not salivate? could we not salivate? could you not salivate? could they not salivate?
V-ing form
could I not be salivating? could you not be salivating? could he not be salivating? could we not be salivating? could you not be salivating? could they not be salivating?
Perfect
could I not have salivated? could you not have salivated? could he not have salivated? could we not have salivated? could you not have salivated? could they not have salivated?
V-ing perfect
could I not have been salivating? could you not have been salivating? could he not have been salivating? could we not have been salivating? could you not have been salivating? could they not have been salivating?