Regular verb: exchange - exchanged - exchanged
Simple form | V-ing form |
I could exchange you could exchange he could exchange we could exchange you could exchange they could exchange | I could be exchanging you could be exchanging he could be exchanging we could be exchanging you could be exchanging they could be exchanging |
Perfect | V-ing perfect |
I could have exchanged you could have exchanged he could have exchanged we could have exchanged you could have exchanged they could have exchanged | I could have been exchanging you could have been exchanging he could have been exchanging we could have been exchanging you could have been exchanging they could have been exchanging |
Simple form | V-ing form |
I couldn't exchange you couldn't exchange he couldn't exchange we couldn't exchange you couldn't exchange they couldn't exchange | I couldn't be exchanging you couldn't be exchanging he couldn't be exchanging we couldn't be exchanging you couldn't be exchanging they couldn't be exchanging |
Perfect | V-ing perfect |
I couldn't have exchanged you couldn't have exchanged he couldn't have exchanged we couldn't have exchanged you couldn't have exchanged they couldn't have exchanged | I couldn't have been exchanging you couldn't have been exchanging he couldn't have been exchanging we couldn't have been exchanging you couldn't have been exchanging they couldn't have been exchanging |
Simple form | V-ing form |
could I exchange? could you exchange? could he exchange? could we exchange? could you exchange? could they exchange? | could I be exchanging? could you be exchanging? could he be exchanging? could we be exchanging? could you be exchanging? could they be exchanging? |
Perfect | V-ing perfect |
could I have exchanged? could you have exchanged? could he have exchanged? could we have exchanged? could you have exchanged? could they have exchanged? | could I have been exchanging? could you have been exchanging? could he have been exchanging? could we have been exchanging? could you have been exchanging? could they have been exchanging? |
Simple form | V-ing form |
couldn't I exchange? couldn't you exchange? couldn't he exchange? couldn't we exchange? couldn't you exchange? couldn't they exchange? | couldn't I be exchanging? couldn't you be exchanging? couldn't he be exchanging? couldn't we be exchanging? couldn't you be exchanging? couldn't they be exchanging? |
Perfect | V-ing perfect |
couldn't I have exchanged? couldn't you have exchanged? couldn't he have exchanged? couldn't we have exchanged? couldn't you have exchanged? couldn't they have exchanged? | couldn't I have been exchanging? couldn't you have been exchanging? couldn't he have been exchanging? couldn't we have been exchanging? couldn't you have been exchanging? couldn't they have been exchanging? |