| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [adv] [vb infin] [pron] [det] | 1098 |
|
| 2 | could [adv] [vb infin] [pron] [adj] | 468 |
|
| 3 | could [adv] [verb] [pron] [det] | 186 |
|
