Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could contain contain you could contain contain he could contain contain we could contain contain you could contain contain they could contain contain
V-ing form
I could be contain containing you could be contain containing he could be contain containing we could be contain containing you could be contain containing they could be contain containing
Perfect
I could have contain contained you could have contain contained he could have contain contained we could have contain contained you could have contain contained they could have contain contained
V-ing perfect
I could have been contain containing you could have been contain containing he could have been contain containing we could have been contain containing you could have been contain containing they could have been contain containing
Negation
Simple form
I could not contain contain you could not contain contain he could not contain contain we could not contain contain you could not contain contain they could not contain contain
V-ing form
I could not be contain containing you could not be contain containing he could not be contain containing we could not be contain containing you could not be contain containing they could not be contain containing
Perfect
I could not have contain contained you could not have contain contained he could not have contain contained we could not have contain contained you could not have contain contained they could not have contain contained
V-ing perfect
I could not have been contain containing you could not have been contain containing he could not have been contain containing we could not have been contain containing you could not have been contain containing they could not have been contain containing
Interrogative form
Simple form
could I contain contain? could you contain contain? could he contain contain? could we contain contain? could you contain contain? could they contain contain?
V-ing form
could I be contain containing? could you be contain containing? could he be contain containing? could we be contain containing? could you be contain containing? could they be contain containing?
Perfect
could I have contain contained? could you have contain contained? could he have contain contained? could we have contain contained? could you have contain contained? could they have contain contained?
V-ing perfect
could I have been contain containing? could you have been contain containing? could he have been contain containing? could we have been contain containing? could you have been contain containing? could they have been contain containing?
Interro-negative form
Simple form
could I not contain contain? could you not contain contain? could he not contain contain? could we not contain contain? could you not contain contain? could they not contain contain?
V-ing form
could I not be contain containing? could you not be contain containing? could he not be contain containing? could we not be contain containing? could you not be contain containing? could they not be contain containing?
Perfect
could I not have contain contained? could you not have contain contained? could he not have contain contained? could we not have contain contained? could you not have contain contained? could they not have contain contained?
V-ing perfect
could I not have been contain containing? could you not have been contain containing? could he not have been contain containing? could we not have been contain containing? could you not have been contain containing? could they not have been contain containing?