| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] has [been] [verb] [prep] | 10815 |
|
| 2 | [noun] has [been] [v-ing] [prep] | 557 |
|
| 3 | [noun] have [been] operating [prep] | 21 |
|
| 4 | [noun] [verb] [been] operating [prep] | 21 |
|
| 5 | [noun] has [been] operate [prep] | 13 |
|
| 6 | [noun] has [be] operating [prep] | 12 |
|
| 7 | [noun] [vb -s] [been] operating [prep] | 12 |
|
