| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [adv] of been | 11 |
|
| 2 | [pers pn] could [adv] [prep] been | 11 |
|
| 3 | [pron] could [adv] [prep] been | 11 |
|
| 4 | it could [adv] [prep] been | 9 |
|
| 5 | it could [adv] [prep] been | 9 |
|
| 6 | [pron] could not [prep] been | 8 |
|
| 7 | [pron] could [not/n't] [prep] been | 8 |
|
| 8 | [pron] could n't [prep] been | 7 |
|
