| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | this could [be] [vb pp] [prep] | 181 |
|
| 2 | this [modal v] [be] [vb pp] for | 59 |
|
| 3 | [adj] could [be] [vb pp] for | 54 |
|
| 4 | this could [be] [verb] for | 10 |
|
