I could accrete you could accrete he could accrete we could accrete you could accrete they could accrete
V-ing form
I could be accreting you could be accreting he could be accreting we could be accreting you could be accreting they could be accreting
Perfect
I could have accreted you could have accreted he could have accreted we could have accreted you could have accreted they could have accreted
V-ing perfect
I could have been accreting you could have been accreting he could have been accreting we could have been accreting you could have been accreting they could have been accreting
Negation
Simple form
I couldn't accrete you couldn't accrete he couldn't accrete we couldn't accrete you couldn't accrete they couldn't accrete
V-ing form
I couldn't be accreting you couldn't be accreting he couldn't be accreting we couldn't be accreting you couldn't be accreting they couldn't be accreting
Perfect
I couldn't have accreted you couldn't have accreted he couldn't have accreted we couldn't have accreted you couldn't have accreted they couldn't have accreted
V-ing perfect
I couldn't have been accreting you couldn't have been accreting he couldn't have been accreting we couldn't have been accreting you couldn't have been accreting they couldn't have been accreting
Interrogative form
Simple form
could I accrete? could you accrete? could he accrete? could we accrete? could you accrete? could they accrete?
V-ing form
could I be accreting? could you be accreting? could he be accreting? could we be accreting? could you be accreting? could they be accreting?
Perfect
could I have accreted? could you have accreted? could he have accreted? could we have accreted? could you have accreted? could they have accreted?
V-ing perfect
could I have been accreting? could you have been accreting? could he have been accreting? could we have been accreting? could you have been accreting? could they have been accreting?
Interro-negative form
Simple form
couldn't I accrete? couldn't you accrete? couldn't he accrete? couldn't we accrete? couldn't you accrete? couldn't they accrete?
V-ing form
couldn't I be accreting? couldn't you be accreting? couldn't he be accreting? couldn't we be accreting? couldn't you be accreting? couldn't they be accreting?
Perfect
couldn't I have accreted? couldn't you have accreted? couldn't he have accreted? couldn't we have accreted? couldn't you have accreted? couldn't they have accreted?
V-ing perfect
couldn't I have been accreting? couldn't you have been accreting? couldn't he have been accreting? couldn't we have been accreting? couldn't you have been accreting? couldn't they have been accreting?