| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it has [adv] been recognised | 26 |
|
| 2 | it has [adv] been recognised | 26 |
|
| 3 | it has long been recognised | 15 |
|
| 4 | it has long been recognised | 15 |
|
| 5 | it has been recognised that | 12 |
|
| 6 | it has been recognised [that] | 12 |
|
| 7 | it has been recognised that | 12 |
|
| 8 | it has been recognised [conj] | 12 |
|
