| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it could [adv] of [be] | 9 |
|
| 2 | it could [not/n't] of [be] | 7 |
|
| 3 | it could not of [be] | 7 |
|
| 4 | it could n't of [be] | 6 |
|
