| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] must of [been] | 99 |
|
| 2 | they [vb mod] of [been] | 29 |
|
| 3 | they [modal v] of [been] | 29 |
|
| 4 | they must of [been] | 12 |
|
| 5 | they must of [be] | 12 |
|
| 6 | they must [prep] [been] | 12 |
|
