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