I ought to crab you ought to crab she ought to crab we ought to crab you ought to crab they ought to crab
V-ing form
I ought to be crabbing you ought to be crabbing she ought to be crabbing we ought to be crabbing you ought to be crabbing they ought to be crabbing
Perfect
I ought to have crabbed you ought to have crabbed she ought to have crabbed we ought to have crabbed you ought to have crabbed they ought to have crabbed
V-ing perfect
I ought to have been crabbing you ought to have been crabbing she ought to have been crabbing we ought to have been crabbing you ought to have been crabbing they ought to have been crabbing
Negation
Simple form
I ought not to crab you ought not to crab she ought not to crab we ought not to crab you ought not to crab they ought not to crab
V-ing form
I ought not to crabbing you ought not to crabbing she ought not to crabbing we ought not to crabbing you ought not to crabbing they ought not to crabbing
Perfect
I ought not to have crabbed you ought not to have crabbed she ought not to have crabbed we ought not to have crabbed you ought not to have crabbed they ought not to have crabbed
V-ing perfect
I ought not to have been crabbing you ought not to have been crabbing she ought not to have been crabbing we ought not to have been crabbing you ought not to have been crabbing they ought not to have been crabbing
Interrogative form
Simple form
ought to I crab? ought to you crab? ought to she crab? ought to we crab? ought to you crab? ought to they crab?
V-ing form
ought to I be crabbing? ought to you be crabbing? ought to she be crabbing? ought to we be crabbing? ought to you be crabbing? ought to they be crabbing?
Perfect
ought to I have crabbed? ought to you have crabbed? ought to she have crabbed? ought to we have crabbed? ought to you have crabbed? ought to they have crabbed?
V-ing perfect
ought to I have been crabbing? ought to you have been crabbing? ought to she have been crabbing? ought to we have been crabbing? ought to you have been crabbing? ought to they have been crabbing?
Interro-negative form
Simple form
ought I not to crab? ought you not to crab? ought she not to crab? ought we not to crab? ought you not to crab? ought they not to crab?
V-ing form
ought I not to be crabbing? ought you not to be crabbing? ought she not to be crabbing? ought we not to be crabbing? ought you not to be crabbing? ought they not to be crabbing?
Perfect
ought I not to have crabbed? ought you not to have crabbed? ought she not to have crabbed? ought we not to have crabbed? ought you not to have crabbed? ought they not to have crabbed?
V-ing perfect
ought I not to have been crabbing? ought you not to have been crabbing? ought she not to have been crabbing? ought we not to have been crabbing? ought you not to have been crabbing? ought they not to have been crabbing?