I could expectorate you could expectorate she could expectorate we could expectorate you could expectorate they could expectorate
V-ing form
I could be expectorating you could be expectorating she could be expectorating we could be expectorating you could be expectorating they could be expectorating
Perfect
I could have expectorated you could have expectorated she could have expectorated we could have expectorated you could have expectorated they could have expectorated
V-ing perfect
I could have been expectorating you could have been expectorating she could have been expectorating we could have been expectorating you could have been expectorating they could have been expectorating
Negation
Simple form
I could not expectorate you could not expectorate she could not expectorate we could not expectorate you could not expectorate they could not expectorate
V-ing form
I could not be expectorating you could not be expectorating she could not be expectorating we could not be expectorating you could not be expectorating they could not be expectorating
Perfect
I could not have expectorated you could not have expectorated she could not have expectorated we could not have expectorated you could not have expectorated they could not have expectorated
V-ing perfect
I could not have been expectorating you could not have been expectorating she could not have been expectorating we could not have been expectorating you could not have been expectorating they could not have been expectorating
Interrogative form
Simple form
could I expectorate? could you expectorate? could she expectorate? could we expectorate? could you expectorate? could they expectorate?
V-ing form
could I be expectorating? could you be expectorating? could she be expectorating? could we be expectorating? could you be expectorating? could they be expectorating?
Perfect
could I have expectorated? could you have expectorated? could she have expectorated? could we have expectorated? could you have expectorated? could they have expectorated?
V-ing perfect
could I have been expectorating? could you have been expectorating? could she have been expectorating? could we have been expectorating? could you have been expectorating? could they have been expectorating?
Interro-negative form
Simple form
could I not expectorate? could you not expectorate? could she not expectorate? could we not expectorate? could you not expectorate? could they not expectorate?
V-ing form
could I not be expectorating? could you not be expectorating? could she not be expectorating? could we not be expectorating? could you not be expectorating? could they not be expectorating?
Perfect
could I not have expectorated? could you not have expectorated? could she not have expectorated? could we not have expectorated? could you not have expectorated? could they not have expectorated?
V-ing perfect
could I not have been expectorating? could you not have been expectorating? could she not have been expectorating? could we not have been expectorating? could you not have been expectorating? could they not have been expectorating?