| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [modal v] have [been] [prep] [det] | 60 |
|
| 2 | [pron] could have [been] [prep] [adj] | 12 |
|
| 3 | [pron] could have [be] [prep] [det] | 8 |
|
| 4 | [pron] could [verb] [been] [prep] [det] | 8 |
|
