| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have been [prep] [det] [noun sg] | 12 |
|
| 2 | it has been [prep] [det] [noun] | 8 |
|
| 3 | it have been [prep] [det] [noun pl] | 8 |
|
| 4 | it had been [prep] [det] [noun] | 7 |
|
| 5 | it 's been [prep] [det] [noun] | 6 |
|
| 6 | it have been [prep] several [noun] | 5 |
|
| 7 | it have been on [det] [noun] | 5 |
|
