| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they [modal v] [be] | 11900 |
|
| 2 | they [vb mod] [be] | 11900 |
|
| 3 | [pron] could [be] | 9101 |
|
| 4 | they could [be] | 880 |
|
