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