| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it has been [adj] [prep] | 126 |
|
| 2 | it have been [adj] for | 115 |
|
| 3 | it had been [adj] [prep] | 93 |
|
| 4 | it have been [adj] in | 40 |
|
| 5 | it 's been [adj] [prep] | 40 |
|
| 6 | it have been [adj] to | 38 |
|
| 7 | it have been possible [prep] | 17 |
|
| 8 | it have been necessary [prep] | 13 |
|
| 9 | it have been [adj] from | 13 |
|
| 10 | it have been [adj] of | 13 |
|
| 11 | it have been clear [prep] | 11 |
|
| 12 | it have been [adj] on | 9 |
|
| 13 | it have been [adj] at | 7 |
|
| 14 | it have been [adj] since | 7 |
|
| 15 | it have been good [prep] | 7 |
|
| 16 | it have been open [prep] | 7 |
|
| 17 | it have been responsible [prep] | 6 |
|
| 18 | it have been [adj] with | 6 |
|
| 19 | it have been difficult [prep] | 5 |
|
| 20 | it have been concerned [prep] | 5 |
|
| 21 | it have been obvious [prep] | 5 |
|
| 22 | it have been easy [prep] | 5 |
|
