| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have [adv] been a | 165 |
|
| 2 | it had [adv] been a | 100 |
|
| 3 | it has [adv] been a | 73 |
|
| 4 | it have [not/n't] been a | 62 |
|
| 5 | it have not been a | 62 |
|
| 6 | it 's [adv] been a | 54 |
|
| 7 | it have always been a | 39 |
|
| 8 | it have always been a | 39 |
|
| 9 | it have not been a | 33 |
|
| 10 | it have n't been a | 29 |
|
| 11 | it have all been a | 29 |
|
| 12 | it have all been a | 29 |
|
| 13 | it have only been a | 15 |
|
| 14 | it have only been a | 15 |
|
| 15 | it have just been a | 12 |
|
| 16 | it have just been a | 12 |
|
| 17 | it have long been a | 11 |
|
| 18 | it have long been a | 11 |
|
| 19 | it have also been a | 9 |
|
| 20 | it have also been a | 9 |
|
| 21 | it have never been a | 7 |
|
| 22 | it have never been a | 7 |
|
| 23 | it have indeed been a | 5 |
|
| 24 | it have indeed been a | 5 |
|
