| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could do [pron] [adv] | 77 |
|
| 2 | could [verb] nothing [adv] | 36 |
|
| 3 | could [vb infin] nothing [adv] | 36 |
|
| 4 | [modal v] do nothing [adv] | 28 |
|
| 5 | could do nothing [adv] | 9 |
|
