| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they could [adv] [vb infin] | 587 |
|
| 2 | could [adv] [vb infin] [noun pl] | 217 |
|
| 3 | they could [vb infin] [noun pl] | 91 |
|
| 4 | they [adv] [vb infin] [noun pl] | 10 |
|
