I could transplant you could transplant she could transplant we could transplant you could transplant they could transplant
V-ing form
I could be transplanting you could be transplanting she could be transplanting we could be transplanting you could be transplanting they could be transplanting
Perfect
I could have transplanted you could have transplanted she could have transplanted we could have transplanted you could have transplanted they could have transplanted
V-ing perfect
I could have been transplanting you could have been transplanting she could have been transplanting we could have been transplanting you could have been transplanting they could have been transplanting
Negation
Simple form
I couldn't transplant you couldn't transplant she couldn't transplant we couldn't transplant you couldn't transplant they couldn't transplant
V-ing form
I couldn't be transplanting you couldn't be transplanting she couldn't be transplanting we couldn't be transplanting you couldn't be transplanting they couldn't be transplanting
Perfect
I couldn't have transplanted you couldn't have transplanted she couldn't have transplanted we couldn't have transplanted you couldn't have transplanted they couldn't have transplanted
V-ing perfect
I couldn't have been transplanting you couldn't have been transplanting she couldn't have been transplanting we couldn't have been transplanting you couldn't have been transplanting they couldn't have been transplanting
Interrogative form
Simple form
could I transplant? could you transplant? could she transplant? could we transplant? could you transplant? could they transplant?
V-ing form
could I be transplanting? could you be transplanting? could she be transplanting? could we be transplanting? could you be transplanting? could they be transplanting?
Perfect
could I have transplanted? could you have transplanted? could she have transplanted? could we have transplanted? could you have transplanted? could they have transplanted?
V-ing perfect
could I have been transplanting? could you have been transplanting? could she have been transplanting? could we have been transplanting? could you have been transplanting? could they have been transplanting?
Interro-negative form
Simple form
couldn't I transplant? couldn't you transplant? couldn't she transplant? couldn't we transplant? couldn't you transplant? couldn't they transplant?
V-ing form
couldn't I be transplanting? couldn't you be transplanting? couldn't she be transplanting? couldn't we be transplanting? couldn't you be transplanting? couldn't they be transplanting?
Perfect
couldn't I have transplanted? couldn't you have transplanted? couldn't she have transplanted? couldn't we have transplanted? couldn't you have transplanted? couldn't they have transplanted?
V-ing perfect
couldn't I have been transplanting? couldn't you have been transplanting? couldn't she have been transplanting? couldn't we have been transplanting? couldn't you have been transplanting? couldn't they have been transplanting?