| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they [vb mod] hear [pos pn] | 7 |
|
| 2 | they [modal v] hear [pos pn] | 7 |
|
| 3 | they could hear [pos pn] | 5 |
|
| 4 | they could hear [pos pn] | 5 |
|
