| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [adv] [prep] been | 40 |
|
| 2 | could [adv] [prep] been | 17 |
|
| 3 | could [adv] [prep] be | 17 |
|
| 4 | could [adv] [prep] [been] | 17 |
|
| 5 | could [adv] [prep] [be] | 17 |
|
