| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they could [prep] | 136 |
|
| 2 | they could [prep] | 136 |
|
| 3 | [pron] could at | 117 |
|
| 4 | [pers pn] could at | 109 |
|
| 5 | they [vb mod] at | 78 |
|
| 6 | they [modal v] at | 78 |
|
| 7 | they could at | 12 |
|
| 8 | they could at | 12 |
|
| 9 | they could at | 12 |
|
