| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [ex0] [vb mod] [prep] [be] | 451 |
|
| 2 | [pron] [vb mod] [prep] [been] | 261 |
|
| 3 | [ex0] [modal v] [prep] [been] | 20 |
|
