| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [vb infin] [prep] | 1530 |
|
| 2 | they could [adv] [vb infin] | 587 |
|
| 3 | they could [vb infin] [prep] | 582 |
|
| 4 | they [adv] [vb infin] [prep] | 56 |
|
