| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] be [prep] | 4611 |
|
| 2 | be working [prep] | 2922 |
|
| 3 | [vb past] be working | 284 |
|
| 4 | [vb past] working [prep] | 152 |
|
