| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] been [verb] for [num] | 448 |
|
| 2 | [verb] been [v-ing] for [num] | 185 |
|
| 3 | [verb] been operating [prep] [num] | 7 |
|
| 4 | [verb] been operating for [adj] | 6 |
|
| 5 | [verb] be operating for [num] | 5 |
|
| 6 | [verb] [been] operating for [num] | 5 |
|
| 7 | [verb] been operate for [num] | 5 |
|
| 8 | [verb] [be] operating for [num] | 5 |
|
