| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [vb infin] [n mass] | 28 |
|
| 2 | could [adv] [verb] [n mass] | 28 |
|
| 3 | could [adv] [verb] people | 6 |
|
| 4 | could only [verb] [n mass] | 6 |
|
| 5 | could also [verb] [n mass] | 5 |
|
