| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it had [been] [verb] [noun] | 21 |
|
| 2 | it had been [verb] [noun] | 21 |
|
| 3 | it had be [verb] [noun] | 21 |
|
| 4 | it had [be] [vb pp] [noun] | 18 |
|
| 5 | it had [be] [verb] [noun sg] | 14 |
|
