| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [vb infin] [prep] | 3646 |
|
| 2 | [adv] [pron] [vb infin] [prep] | 632 |
|
| 3 | could [pron] [vb infin] [prep] | 391 |
|
| 4 | could [adv] [pron] [vb infin] | 333 |
|
| 5 | could [adv] [pron] [prep] | 14 |
|
