| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [vb infin] [prep] | 50322 |
|
| 2 | could [adv] [vb infin] | 32770 |
|
| 3 | could [vb infin] [prep] | 9758 |
|
| 4 | could [adv] [prep] | 227 |
|
