| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [prep] be | 18906 |
|
| 2 | progress [vb past] be | 50 |
|
| 3 | progress [prep] be | 20 |
|
| 4 | progress [vb past] [prep] | 13 |
|
