I could bioassay you could bioassay he could bioassay we could bioassay you could bioassay they could bioassay
V-ing form
I could be bioassaying you could be bioassaying he could be bioassaying we could be bioassaying you could be bioassaying they could be bioassaying
Perfect
I could have bioassayed you could have bioassayed he could have bioassayed we could have bioassayed you could have bioassayed they could have bioassayed
V-ing perfect
I could have been bioassaying you could have been bioassaying he could have been bioassaying we could have been bioassaying you could have been bioassaying they could have been bioassaying
Negation
Simple form
I could not bioassay you could not bioassay he could not bioassay we could not bioassay you could not bioassay they could not bioassay
V-ing form
I could not be bioassaying you could not be bioassaying he could not be bioassaying we could not be bioassaying you could not be bioassaying they could not be bioassaying
Perfect
I could not have bioassayed you could not have bioassayed he could not have bioassayed we could not have bioassayed you could not have bioassayed they could not have bioassayed
V-ing perfect
I could not have been bioassaying you could not have been bioassaying he could not have been bioassaying we could not have been bioassaying you could not have been bioassaying they could not have been bioassaying
Interrogative form
Simple form
could I bioassay? could you bioassay? could he bioassay? could we bioassay? could you bioassay? could they bioassay?
V-ing form
could I be bioassaying? could you be bioassaying? could he be bioassaying? could we be bioassaying? could you be bioassaying? could they be bioassaying?
Perfect
could I have bioassayed? could you have bioassayed? could he have bioassayed? could we have bioassayed? could you have bioassayed? could they have bioassayed?
V-ing perfect
could I have been bioassaying? could you have been bioassaying? could he have been bioassaying? could we have been bioassaying? could you have been bioassaying? could they have been bioassaying?
Interro-negative form
Simple form
could I not bioassay? could you not bioassay? could he not bioassay? could we not bioassay? could you not bioassay? could they not bioassay?
V-ing form
could I not be bioassaying? could you not be bioassaying? could he not be bioassaying? could we not be bioassaying? could you not be bioassaying? could they not be bioassaying?
Perfect
could I not have bioassayed? could you not have bioassayed? could he not have bioassayed? could we not have bioassayed? could you not have bioassayed? could they not have bioassayed?
V-ing perfect
could I not have been bioassaying? could you not have been bioassaying? could he not have been bioassaying? could we not have been bioassaying? could you not have been bioassaying? could they not have been bioassaying?