| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [prep] been | 30 |
|
| 2 | [pers pn] could [prep] been | 29 |
|
| 3 | they [modal v] [prep] been | 27 |
|
| 4 | they [vb mod] [prep] been | 27 |
|
| 5 | they could [prep] [been] | 6 |
|
| 6 | they could [prep] [be] | 6 |
|
| 7 | they could [prep] been | 6 |
|
| 8 | they could [prep] be | 6 |
|
| 9 | they could [prep] been | 6 |
|
