| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they could [verb] [pos pn] | 185 |
|
| 2 | [pron] could hear [pos pn] | 99 |
|
| 3 | [pers pn] could hear [pos pn] | 98 |
|
| 4 | they could hear [pron] | 23 |
|
| 5 | they [modal v] hear [pos pn] | 7 |
|
| 6 | they could hear [pos pn] | 5 |
|
