| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] been [verb] [prep] the | 5195 |
|
| 2 | [vb past] been [v-ing] [prep] the | 562 |
|
| 3 | [verb] been operating [prep] the | 8 |
|
| 4 | [vb past] been operating [prep] [art] | 7 |
|
| 5 | [vb past] been operating [prep] [art] | 7 |
|
| 6 | [vb past] be operating [prep] the | 5 |
|
| 7 | [vb past] been operating [prep] the | 5 |
|
| 8 | [vb past] been operate [prep] the | 5 |
|
| 9 | [vb past] [been] operating [prep] the | 5 |
|
| 10 | [vb past] [be] operating [prep] the | 5 |
|
| 11 | [vb past] been operating [prep] the | 5 |
|
