I could ingest you could ingest he could ingest we could ingest you could ingest they could ingest
V-ing form
I could be ingesting you could be ingesting he could be ingesting we could be ingesting you could be ingesting they could be ingesting
Perfect
I could have ingested you could have ingested he could have ingested we could have ingested you could have ingested they could have ingested
V-ing perfect
I could have been ingesting you could have been ingesting he could have been ingesting we could have been ingesting you could have been ingesting they could have been ingesting
Negation
Simple form
I could not ingest you could not ingest he could not ingest we could not ingest you could not ingest they could not ingest
V-ing form
I could not be ingesting you could not be ingesting he could not be ingesting we could not be ingesting you could not be ingesting they could not be ingesting
Perfect
I could not have ingested you could not have ingested he could not have ingested we could not have ingested you could not have ingested they could not have ingested
V-ing perfect
I could not have been ingesting you could not have been ingesting he could not have been ingesting we could not have been ingesting you could not have been ingesting they could not have been ingesting
Interrogative form
Simple form
could I ingest? could you ingest? could he ingest? could we ingest? could you ingest? could they ingest?
V-ing form
could I be ingesting? could you be ingesting? could he be ingesting? could we be ingesting? could you be ingesting? could they be ingesting?
Perfect
could I have ingested? could you have ingested? could he have ingested? could we have ingested? could you have ingested? could they have ingested?
V-ing perfect
could I have been ingesting? could you have been ingesting? could he have been ingesting? could we have been ingesting? could you have been ingesting? could they have been ingesting?
Interro-negative form
Simple form
could I not ingest? could you not ingest? could he not ingest? could we not ingest? could you not ingest? could they not ingest?
V-ing form
could I not be ingesting? could you not be ingesting? could he not be ingesting? could we not be ingesting? could you not be ingesting? could they not be ingesting?
Perfect
could I not have ingested? could you not have ingested? could he not have ingested? could we not have ingested? could you not have ingested? could they not have ingested?
V-ing perfect
could I not have been ingesting? could you not have been ingesting? could he not have been ingesting? could we not have been ingesting? could you not have been ingesting? could they not have been ingesting?