| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they [vb mod] [be] | 11397 |
|
| 2 | they [modal v] [be] | 11397 |
|
| 3 | [pron] could [be] | 9101 |
|
| 4 | [pers pn] could [be] | 6009 |
|
| 5 | they could [be] | 880 |
|
| 6 | they could [be] | 835 |
|
