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