| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [indef pn] could [vb infin] | 2035 |
|
| 2 | [adv] could [vb infin] | 661 |
|
| 3 | [adv] [indef pn] could | 198 |
|
| 4 | [adv] [indef pn] [vb infin] | 78 |
|
